STA301 Midterm Solved MCQs With References PDF

lOMoARcPSD|42773357 STA301-Mid term Solved MCQs With References Statistics and Probability (Virtual University of Pakistan) Scan to open on Studocu Studocu is not sponsored or endorsed by any college or...

lOMoARcPSD|42773357 STA301-Mid term Solved MCQs With References Statistics and Probability (Virtual University of Pakistan) Scan to open on Studocu Studocu is not sponsored or endorsed by any college or university Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 STA301- Statistics and Probability Solved MCQS March 19,2012 From Midterm Papers MC100401285 [email protected] [email protected] PSMD01 MIDTERM EXAMINATION (Spring 2011) STA301- Statistics and Probability Question No: 1 (Marks: 1) - Please choose one A five number summery consist of : ► X 0 , Q1 , Median, Q3 , andX m ( Page97) ► X m , Q1 , Mean, Q3 , and X 0 ► X m , Q1 , Mode, Q3 , and X 0 ► X 0 , Q1 , Median, Q2 , andX m Question No: 3 (Marks: 1) - Please choose one in a multiplication theorem P( A  B) equals: ►P(A) P(B) ►P(A) + P(B) ►P(A) * P(B|A) (Page 159) ►P(B\A) * P(B) Question No: 4 (Marks: 1) - Please choose one The probability of drawing 8White9 ball from a bag containing 4 red , 8 black and 3 white ball is ►0 ►3/15 ►1/12 ►1/2 Question No: 6 (Marks: 1) - Please choose one If A and B are mutually exclusive events then P(A or B) equals: ►P(A) + P(B) - P(A and B) ►P(A) * P(B) ►P(A) + P(B) (Page 155) ►P(A|B) + P(B|A) 1 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 Question No: 7 (Marks: 1) - Please choose one The simultaneous occurrence of two events is called ►Prior probability ►Subjective probability not confirmed ►Conditional probability ►Joint probability click here for detail Question No: 8 (Marks: 1) - Please choose one First moment about origin is always equals to: ►Mean (Page 119) ►Variance ►Standard Deviation ►Zero Question No: 9 (Marks: 1) - Please choose one Which one of the following measurement does not divide a set of observations into equal parts? ► Quartiles ► Deciles ► Percentiles ► Standard deviations Question No: 10 (Marks: 1) - Please choose one if first and third quartile are 21.16 and 56.36 respectively, then the quartile deviation is: ►17.1 (Page 84) ►34.2 ►51.3 ►50.5 Question No: 11 (Marks: 1) - Please choose one The height of student is 60 inch. This is an example of……? ►Continues data ►Qualitative data ►Categorical data ►Discrete data Question No: 12 (Marks: 1) - Please choose one Which of the statement is true regarding a sample? ►It is a part of population (Page 13) ►It must contain at least five observations ►It refers to descriptive statistics ►It produces true value 2 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 Question No: 13 (Marks: 1) - Please choose one Which one of the following graphs is used for a time series data? ► Histogram ► Historigram ► Frequency curve ► Frequency polygon Click here for detail Question No: 14 (Marks: 1) - Please choose one Which of the following comes first to make frequency distribution ►No. of groups ►Class intervals ►Rang (Page 28) ►Tally marks Question No: 15 (Marks: 1) - Please choose one The average which is defines as reciprocal of arithmetic mean of the reciprocals of the values is called ►Geometric Mean ►Harmonic mean (Page 77) ►Mode ►Median Question No: 16 (Marks: 1) - Please choose one If a car is running at the rate of 15km/hr during first 30km, at 20km/hr during the second 30, which type of average will be used to find the average speed/hr: ►Weighted mean (Not sure) ►Harmonic mean ►Arithmetic mean ►Geometric mean 3 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 MIDTERM EXAMINATION (Spring 2011) STA301- Statistics and Probability Question No: 1 (Marks: 1) - Please choose one The probability of drawing a 8jack card 8from 52 playing cards is: 1 ► 52 4 ► 52 13 52 ► 26 52 ► Question No: 2 (Marks: 1) - Please choose one If all the values fall on the same straight line and the line has a positive slope then what will be the value of the correlation coefficient 8r9: ►0frf1 ►rg0 ► r = +1 ► r=-1 Question No: 3 (Marks: 1) - Please choose one If a curve has a longer tail to the right, it is called: ► Positively skewed (Page 39) ► Negatively skewed ► J-shaped ► Symmetric Question No: 04 (Marks: 1) - Please choose one Which one of the following is not included in measures of central tendency? ► Quartile deviation (Page 82) ► Harmonic mean ► Geometric mean ► Arithmetic mean 4 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 Question No: 05 ( Marks: 1 ) - Please choose one Which of the following is not based on all the observations? ► Arithmetic Mean ► Geometric Mean ► Harmonic mean ► Mode Question No: 06 ( Marks: 1 ) - Please choose one What is the Standard Deviation of 7, 7, 7, 7, 7, 7, 7 ►49 ►1 ►0 Standard deviation will always be zero if all the values in data are same ►7 MIDTERM EXAMINATION (Spring 2010) STA301- Statistics and Probability (Session - 4) Question No: 1 (Marks: 1) - Please choose one 10! =…………. ► 362880 ► 3628800 ► 362280 ► 362800 Question No: 2 (Marks: 1) - Please choose one If a player well shuffles the pack of 52 playing cards, then the probability of a black card from 52 playing cards is: ►1/52 ► 13/52 ►4/52 ►26/52 5 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 Question No: 3 (Marks: 1) - Please choose one The probability of drawing a 8jack card 8from 52 playing cards is: ►1/52 ►4/52 ►13/52 ►26/52 Question No: 4 (Marks: 1) - Please choose one Which dispersion is used to compare variation of two series? ► C.V. (Page 93) ► Q.D. ► M.D. ► S.D. Question No: 5 (Marks: 1) - Please choose one If all the values fall on the same straight line and the line has a positive slope then what will be the value of the correlation coefficient 8r9: ►0frf1 ►rg0 ► r = +1 (Page 129) ► r=-1 Question No: 6 (Marks: 1) - Please choose one In a regression line Y= a + bX, the value of the correlation coefficient will be zero if: ► ►Intercept a = 0 ► Intercept a ≠ 0 ► ►Slope b = 0 ► ►Slope b ≠ 0 Question No: 7 (Marks: 1) - Please choose one When two coins are tossed the probability of at least one head is: ► 1/4 ► 3/4 (HH, HT, TH, TT) ► 2/4 ► 4/4 6 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 Question No: 8 (Marks: 1) - Please choose one Which one of the following measurement does not divide a set of observations into equal parts? ► Quartiles ► Deciles ► Percentiles ► Standard deviations rep Question No: 9 (Marks: 1) - Please choose one In the model Y = mX + a, Y is also known as the: ► Predictor variable ► Independent variable ► Predicted (dependent) variable (Page 121) ► Explanatory variable Question No: 10 (Marks: 1) - Please choose one According to empirical rule approximately 95% of the measurements will fall under which interval? ► X S ► X  2S correct ► X  3S ► X  4S Question No: 11 (Marks: 1) - Please choose one Which one of the following is written at the top of the table? ► Source note ► Foot note ► Prefatory note ► Title Click here for detail Question No: 12 (Marks: 1) - Please choose one If a curve has a longer tail to the right, it is called: ► Positively skewed rep ► Negatively skewed ► J-shaped ► Symmetric 7 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 Question No: 13 (Marks: 1) - Please choose one Which one of the following is the class frequency? ► The number of observations in each class ► The difference between consecutive lower class limits ► Always contains at least 5 observations ► Usually a multiple of the lower limit of the first class Question No: 14 (Marks: 1) - Please choose one f ( x) If X is a discrete random variable, then the function is ► A probability function ► A probability density function ► A density function ► A distribution function (Page 173) Question No: 15 (Marks: 1) - Please choose one Which one of the following graphs is used for a time series data? ► Histogram ► Historigram ► Frequency curve ► Frequency polygon Question No: 16 (Marks: 1) - Please choose one If you connect the mid-points of rectangles in a histogram by a series of lines that also touches the x-axis from both ends, what will you get? ► Ogive ► Frequency polygon ► Frequency curve (Page 38) ► Historigram Question No: 17 (Marks: 1) - Please choose one If mean of the two observations is 10.5, then median of these two observations will be: ► 7.5 ► 8.5 ► 9.5 ► 10.5 (Page 68) 8 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 Question No: 18 (Marks: 1) - Please choose one Which one is the formula of mid range? xm  x0 ► x0  xm ► x0  xm 2 ► x x ► 0 m (Page 80) 2 Question No: 19 (Marks: 1) - Please choose one Which one of the following is not included in measures of central tendency? ► Quartile deviation (page 82) ► Harmonic mean ► Geometric mean ► Arithmetic mean Question No: 20 (Marks: 1) - Please choose one For the given data 2, 3, 7, 0, -8 G. M will be: ► Negative ► Positive ► Zero (Page 75) ► Undefined MIDTERM 9 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 Question No: 2 (Marks: 1) - Please choose one The probability of drawing a 8jack card 8from 52 playing cards is: ►1/52 ►13/52 ►4/52 rep ►26/52 Question No: 3 (Marks: 1) - Please choose one In a regression line Y= a + bX, the value of the correlation coefficient will be zero if: ► Intercept a = 0 rep ► Intercept a ≠ 0 ► Slope b = 0 ► Slope b ≠ 0 Question No: 4 (Marks: 1) - Please choose one Which one of the following measurement does not divide a set of observations into equal parts? ► Quartiles ► Deciles ► Percentiles ► Standard deviations rep Question No: 5 (Marks: 1) - Please choose one Which one of the following graphs is used for a time series data? ► Histogram ► Historigram ► Frequency curve ► Frequency polygon rep Question No: 6 (Marks: 1) - Please choose one If you connect the mid-points of rectangles in a histogram by a series of lines that also touches the x-axis from both ends, what will you get? ► Ogive ► Frequency polygon ► Frequency curve (Page 38) rep ► Historigram 10 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 Question No:7 (Marks: 1) - Please choose one Which one is equal to explained variation divided by total variation? ►Sum of square due to regression ► Coefficient of determinant Click here for detail ►Standard error estimate ► Coefficient of correlation Question No: 8 (Marks: 1) - Please choose one in the given series 1,2,1,1,2,2,2,3,4,5,3,2,3,1,4,2,3 mode of given is ►4 ►3 ►1 ►2 Question No: 9 (Marks: 1) - Please choose one True for the population, ► it must be large number of values ► It must refer to people ► It is collection of individual objects or measurement (Page 12) ► It is the small part of whole Question No:10 (Marks: 1) - Please choose one Data arrangement in ascending or descending order ► Array data (Page 47) ► Group data ► Ungroup data ► Raw data Question No: 11 (Marks: 1) - Please choose one What is the main objective of Descriptive statistics? ► To test population properties ► To describe the data we collected ► To infer something about the population ► Making estimate Click here for detail Question No: 12 (Marks: 1) - Please choose one Which measure of central tendency? ► Variation of distribution ► Average of distribution (Page 51) ► Scattering of distribution ► Dispersion of distribution 11 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 Question No: 13 (Marks: 1) - Please choose one If a=4 b=2 estimate line (i.e y=a+bx) and independent variable has value 3 the value of dependent variable ►6 ►9 ► 10 4+2(3)=10 ► 11 Question No: 14 (Marks: 1) - Please choose one The number of ways in which 4 books can be arranged ►4 ►6 ► 12 ► 24 (Page 142) Question No: 15 (Marks: 1) - Please choose one If we plot paired observed (x,y)=1…….n on graph is called, ► Polygon ► Freasito diagram ► Scatter diagram ► Cumulative frequency diagram Question No: 16 (Marks: 1) - Please choose one The simultaneous occurrence of two events is called ► Descriptive probability ► Subjective probability ► Conditional probability ► Joint probability Question No: 17 (Marks: 1) - Please choose one Which one is the not measure of dispersion. ► The range ► 50th percentile ► Inter quartile range ► Variance Question No: 18 (Marks: 1) - Please choose one In positively skew cure which relation is ► The mean, median and mode are equal ► Mean is greater then median Click here for detail ► Median is greater then mean ► Standard deviation must be greater then mean or median 12 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 Question No: 19 (Marks: 1) - Please choose one When coin tossed we get only ►1 outcome ►2 outcomes ►3 outcomes ►4 outcomes Question No: 20 (Marks: 1) - Please choose one When mean is 25 and S.D is 5 then CV is ► 100% ► 25% ► 20% ► 10% MIDTERM EXAMINATION Spring 2009 STA301- Statistics and Probability (Session - 1) Question No: 1 ( Marks: 1 ) - Please choose one For a positively skewed distribution m3 will be: ► Positive (Page 119) ► Negative ► Zero ► 1 Question No: 2 ( Marks: 1 ) - Please choose one When data is labeled to identify an attribute of element, the measurement scale is: ► Ordinal (Page 9) ► Interval ► Nominal ► Ratio 13 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 Question No: 3 ( Marks: 1 )- Please choose one Yˆ  5  2 X Suppose the estimated equation is has been calculated for a set of data. What is slop of the line: ►0 ►2 ►-2 (Page 121) ►5 Question No: 4 ( Marks: 1 ) - Please choose one P( A  B)  0.20 If P(B|A) = 0.25 and , then P(A) is: ► 0.05 ► 0.80 (Page 159) ► 0.95 ► 0.75 P( A  B) P ø B | Aù  P ø Aù P( A  B)  P ø Aù  P ø B | Aù 0.20   0.80 0.25 Question No: 5 ( Marks: 1 ) - Please choose one Which branch of statistics deals with the techniques that are used to organize, summarize, and present the data: ► Advance statistics ► Probability statistics ► Descriptive statistics (Page 61) ► Inferential statistics Question No: 6 ( Marks: 1 ) - Please choose one In a sample of 800 students in a university, 160, or 20%, are Business majors. Based on the above information, the school's paper reported that "20% of all the students at the university are Business majors." This report is an example of : ► A sample ► A population ► Statistical inference ► Descriptive statistics 14 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 Question No: 7 ( Marks: 1 ) - Please choose one A set that contains all possible outcomes of a system is known as ► Finite Set ► Infinite Set ► Universal Set (Page 134) ► No of these Question No: 8 ( Marks: 1 ) - Please choose one If X and Y are independent, then Var(X-Y) is equal to: ► Var ( X )  Var (Y ) Var ( X )  Var (Y ) ► Var ( X  Y ) ► ► Zero Question No: 9 ( Marks: 1 ) - Please choose one Which of the following is the class frequency ► The number of observations in each class ► The difference between consecutive lower class limits ► Always contains at least 5 observations ► Usually a multiple of the lower limit of the first class Question No: 10 ( Marks: 1 ) - Please choose one How to construct the class interval: ► Divide the class frequencies in half ► Divide the class frequency by the number of observations ► Find the difference between consecutive lower class limits ► Count the number of observations in the class Question No: 11 ( Marks: 1 ) - Please choose one Data in the Population Census Report is: ► Ungrouped data (Page 11) ► Secondary data ► Primary data ► Arrayed data 15 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 Question No: 12 ( Marks: 1 ) - Please choose one What is the range of -2,-3,-5,-10 : ►-12 (Page 28) ►8 ►-8 ►2 Question No: 13 ( Marks: 1 ) - Please choose one The algebraic sum of deviations from mean is: ► Maximum ► Minimum ► Zero (Page 86) ► Undefined Question No: 14 ( Marks: 1 ) - Please choose one The sum of squares of deviations from mean is: ► Undefined ► Zero ► Maximum ► Minimum Question No: 15 ( Marks: 1 ) - Please choose one Statistic is a numerical quantity, which is calculated from: ► Population ► Sample (Page 7) ► Data ► Observations Question No: 16 ( Marks: 1 ) - Please choose one Which of the following is not based on all the observations? ► Arithmetic Mean ► Geometric Mean ► Harmonic mean ► Mode (rep) 16 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 MIDTERM EXAMINATION Spring 2009 STA301- Statistics and Probability (Session - 1) Question No: 1 ( Marks: 1 ) - Please choose one If any value in the data is zero, then it is not possible to have: ►Harmonic Mean ►Arithmetic Mean ►Median ►Mode (rep) Question No: 2 ( Marks: 1 ) - Please choose one For a symmetrical distribution…………is equidistance from median: ►X0 and Xm ►Q1 and Q3 (Page 97) ►X0 and Q1 ►Xm and Q3 Question No: 3 ( Marks: 1 ) - Please choose one Which one of the following measure is not used in 8five number summery9: X0 Q3 X ( Page 97) Q1 Question No: 4 ( Marks: 1 ) - Please choose one If Mean = 25 & S.D is 5 then C.V is ►100% ►25% ►20% (Page 93) ►10% Question No: 5 ( Marks: 1 ) - Please choose one A coin is tossed 3 times then, the number of sample points ii the sample space is: ►3 ►8 ►6 (Page 145) ►4 17 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 Question No: 6 ( Marks: 1 ) - Please choose one What is the difference between a permutation and a combination: ►In a permutation order is important and in a combination it is not Click here for detail ►In a permutation order is not important and in a combination it is important ►A combination is based on the classical definition of probability ►A permutation is based on the classical definition of probability Question No: 7 ( Marks: 1 ) - Please choose one What we consider in simple correlation analysis: ►Several independent variables ►Strength of the association between two variables (Page 128) ►Intercept with the X-axis ►Intercept with the Y-axis Question No: 8 ( Marks: 1 ) - Please choose one If all the values fall on the same straight line and the line has a positive slope then what will be the value of the correlation coefficient 8r9: ►0 = r = 1 ►r = 0 ►r = +1 (rep) ►r=-1 Question No: 9 ( Marks: 1 ) - Please choose one Which of the following measure of dispersion is least affected by extreme values of observations in a data: ►Range Page 82) ►Quartile deviation ►Mean absolute deviation ►Standard deviation Question No: 10 ( Marks: 1 ) - Please choose one The approximate number of observations in a set of data covered by the interval, Median  Q.D are: ►50 per cent (Page 84) ►68.5 per cent ►95.4 per cent ►99 per cent Question No: 11 ( Marks: 1 ) - Please choose one The dispersion which is calculated from all observed values is: ►Standard deviation (Page 87) ►Quartile deviation ►Rang ►Coefficient of Rang 18 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 Question No: 12 ( Marks: 1 ) - Please choose one In a set of 20 values all the values are 2, what is the value of Geometric Mean: ►2 (Page 75) ►5 ►10 ►20 Question No: 13 ( Marks: 1 ) - Please choose one In a set of 10 values all the values are 5, what is the value of 5th Decile: ►2 ►5 ►10 ►20 Question No: 14 ( Marks: 1 ) - Please choose one If a car is running at the rate of 15km/hr during first 30km, at 20km/hr during the second 30, which type of average will be used to find the average speed/hr: ►W.M ►H.M ►A.M ►G.M Question No: 15 ( Marks: 1 ) - Please choose one In stem and leaf plot, data is measured on: ►Ratio Scale ►Interval Scale ►Ordinal scale ►Nominal Scale Question No: 16 ( Marks: 1 ) - Please choose one In statistics, we deal with: ►Individuals ►Isolated items ►Aggregates of facts (Page 7) ►Qualitative data 19 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 MIDTERM EXAMINATION Spring 2009 STA301- Statistics and Probability (Session - 1) Question No: 1 ( Marks: 1 ) - Please choose one Which of the following is a systematic arrangement of data into rows and columns: ►Component bar chart ►Classification ►Tabulation ►Bar chart Question No: 2 ( Marks: 1 ) - Please choose one For any number k ……….1, at least 1 – 1/k2 of the data-values fall within k standard deviations of the mean: ►Greater than 1 (Page 97) ►Less than 1 ►Greater or equal to 1 ►Less or equal to 1 Question No: 3 ( Marks: 1 ) - Please choose one If Mean = 25 & S.D is 5 then C.V is ►100% ►25% ►20% (Page 93)rep ►10% Question No: 4 ( Marks: 1 ) - Please choose one When E is an impossible event,then P(E) is: ►0 (Page 146) ►0.5 ►1 ►2 Question No: 5 ( Marks: 1 ) - Please choose one The data for an ogive is found in which distribution: ►A cumulative frequency distribution (Page 43) ►A relative frequency distribution ►A frequency distribution ►A joint frequency distribution 20 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 Question No: 6 ( Marks: 1 ) - Please choose one Which of the following statements is true regarding a sample: ►It is a part of population (Page 13) rep ►It must contain at least five observations ►It refers to descriptive statistics ►It produces True value Question No: 7 ( Marks: 1 ) - Please choose one Which level of measurement is required for the median: ►Nominal ►Ordinal ►Interval ►Ratio Question No: 8 ( Marks: 1 ) - Please choose one In a the regression line Y= a + bX+ € the variable which is non-random is: ►X Page 122) ►Y ►Both X and Y ►Neither X nor Y Question No: 9 ( Marks: 1 ) - Please choose one The variable plotted on the horizontal or X-axis in a scatter diagram is called the: ►Scatter variable Click here for detail ►Independent variable ►Dependent variable ►Correlation variable Question No: 10 ( Marks: 1 ) - Please choose one Which is the formula of range: ► xm  x0 ( Page 28) ► x0  xm x x ► m 0 2 xm  x0 ► 2 21 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 Question No: 11 ( Marks: 1 ) - Please choose one The descriptive measure of dispersion that is based on the concept of a deviation about the mean is: ►Range ►Inter quartile range ►Quartile deviation ►Standard deviation Question No: 12 ( Marks: 1 ) - Please choose one Which branch of statistics deals with the techniques that are used to organize, summarize, and present the data: ►Advance statistics ►Probability statistics ►Descriptive statistics (rep) ►Inferential statistics Question No: 13 ( Marks: 1 ) - Please choose one A population that can be defined as the aggregate of all the conceivable ways in which a specified event can happen is known as: ►Infinite population ►Finite population ►Concrete population ►Hypothetical population (Page 12) Question No: 14 ( Marks: 1 ) - Please choose one First moment about origin is always equals to: ►Mean Click here for detail ►Variance ►Standard Deviation ►Zero Question No: 15 ( Marks: 1 ) - Please choose one When two dice are rolled, the numbers of possible sample points are: ►6 ►12 ►24 ►36 (6*6=36) Question No: 16 ( Marks: 1 ) - Please choose one The correlation of coefficient lies between : ►0 to 1 ► 0 to  ►- 1 to +1 (Page 128) ► 1 to  22 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 MIDTERM EXAMINATION Spring 2009 STA301- Statistics and Probability (Session - 2) Question No: 1 ( Marks: 1 ) - Please choose one Median can be found only when: ►Data is Discrete ►Data is Attributed Data is continuous ►Data is continuous Data is attributed ►Data is arranged (Page 52) Question No: 2 ( Marks: 1 ) - Please choose one From the following observations 2,3,4,5,4,6,4, the mode is: ►2 ►3 ►4 ►5 Question No: 3 ( Marks: 1 ) - Please choose one How to construct the class interval: ►Divide the class frequencies in half ►Divide the class frequency by the number of observations ►Find the difference between consecutive lower class limits ►Count the number of observations in the class Question No: 4 ( Marks: 1 ) - Please choose one How many elements are in the sample space of rolling one die: ►6 ►12 ►24 ►36 Question No: 5 ( Marks: 1 ) - Please choose one When two coins are tossed the probability of at most one head is: ►1/4 ►2/4 ►3/4 ►4/4 23 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 Question No: 6 ( Marks: 1 ) - Please choose one If A and B are mutually exclusive events then P(A or B) equals: ►P(A) + P(B) - P(A and B) ►P(A) * P(B) ►P(A) + P(B) (Page 155) ►P(A|B) + P(B|A) Question No: 7 ( Marks: 1 ) - Please choose one In scatter diagram the variable plotted along Y-axis is: ►Independent variable ►Dependent variable ►Any one ►Undefined Question No: 8 ( Marks: 1 ) - Please choose one Positive square root of variance of a distribution is: ►Rang ►Quartile deviation ►Standard deviation (Page 91) ►only (a) &(c) Question No: 9 ( Marks: 1 ) - Please choose one When more values are lying at the start of the distribution, it is a: ►Symmetrical distribution ►Positively skewed ►Negatively skewed ►U shape figure Question No: 10 ( Marks: 1 ) - Please choose one What is 8 f m 9 in the formula of mode: ►First frequency ►Last frequency ►Maximum frequency (Page 54) ►Minimum frequency Question No: 11 ( Marks: 1 ) - Please choose one If median = 7 and Mean = 5, what is the value of Q2 : ►1 ►3 ►5 ►7 (because median = Q2) 24 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 Question No: 12 ( Marks: 1 ) - Please choose one The probability of drawing a king of spade from a pack of 52 cards is: ►1/4 ►1/13 ►1/26 ►1/52 Question No: 13 ( Marks: 1 ) - Please choose one When referring to a curve whose longer tail is to the left, you would call it: ►U shape ►Skewed to the left (Page 39) ►Skewed to the right ►Symmetrical Question No: 14 ( Marks: 1 ) - Please choose one In statistics,we deal with: ►Individuals ►Isolated items ►Aggregates of facts (Page 7) rep ►Qualitative data Question No: 15 ( Marks: 1 ) - Please choose one When data is labeled to identify an attribute of element, the measurement scale is: ►Ordinal (Page 9) ►Interval ►Nominal ►Ratio Question No: 16 ( Marks: 1 ) - Please choose one The distribution is mesokurtic if the Moment Coefficient of kurtosis b2 is: ►Equal to 0 ►Equal to 3 ►Less than 3 ►Greater than 3 25 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 MIDTERM EXAMINATION Spring 2009 STA301- Statistics and Probability (Session - 2) Question No: 1 ( Marks: 1 ) - Please choose one A histogram consists of a set of adjacent rectangles whose bases are marked off by: ►Class boundaries (Page 32) ►Class limits ►Class marks ►Class frequency Question No: 2 ( Marks: 1 ) - Please choose one Stem and leaf was introduced by: ►Francis Galton ►Friedman ►John Tukey (Page 47) ►Pearson Question No: 3 ( Marks: 1 ) - Please choose one For positively skewed distribution Mean…….Median…….Mode: ►= ►< ►> Click here for detail ► Question No: 4 ( Marks: 1 ) - Please choose one For a positively skewed distribution: ►MeanMedian ►Mean>Median>Mode Click here for detail Question No: 5 ( Marks: 1 ) - Please choose one 5 C 5 Equals : ►1 ►5 ►10 ►25 26 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 Question No: 6 ( Marks: 1 ) - Please choose one If a curve has a longer tail to the right, it is called : ►Positively skewed (Page 39) ►negatively skewed ►J-shaped ►Symmetric Question No: 7 ( Marks: 1 ) - Please choose one In measures of relative dispersion unit of measurement is: ►Changed ►Vanish (Page 82) ►Does not changed ►Dependent Question No: 8 ( Marks: 1 ) - Please choose one Data used by an agency which is originally collected by them is : ►Primary data (Page 11) ►Raw data ►Secondary data ►Grouped data Question No: 9 ( Marks: 1 ) - Please choose one When we toss a coin , we get only: ►1 outcome ►2 outcomes ►3 outcomes ►4 outcomes Question No: 10 ( Marks: 1 ) - Please choose one Which of the following is the class frequency ►The number of observations in each class ►The difference between consecutive lower class limits ►Always contains at least 5 observations ►Usually a multiple of the lower limit of the first class Question No: 11 ( Marks: 1 ) - Please choose one Standard deviation is affected by the change of________: ►Origin & scale ►Origin only ►Scale only Click here for detail ►Not origin & scale 27 Downloaded by Ismail Bhatti ([email protected])  lOMoARcPSD|42773357 Question No: 12 ( Marks: 1 ) - Please choose one For a moderately skewed distributions, the approximate percentage of case included between   X  2S and X  2S is : ►99.7% ►68% ►95% (Page 95) ►50% Question No: 13 ( Marks: 1 ) - Please choose one A die is rolled. What is the probability that the number rolled is greater than 2 and even: ►1/2 ►1/3 ►2/3 (greater than 2 = 3,4,5,6 = 4 numbers , 4/6=2/3) ►5/6 Question No: 14 ( Marks: 1 ) - Please choose one The probability of drawing any one spade card is: ►1/52 ►4/52 ►13/52 ►52/52 Question No: 15 ( Marks: 1 ) - Please choose one Which of the following is not the type of frequency curves? ►The symmetrical frequency curve ►The extremely skewed frequency curve ►The U-shaped frequency curve ►Frequency polygon (Page 38) Question No: 16 ( Marks: 1 ) - Please choose one If the third moment about mean is zero ( m3  0) , then the distribution is: ►Symmetrical ►Negatively skewed ►Positively skewed ►Mesokurtic 28 Downloaded by Ismail Bhatti ([email protected])