Statistics Practice Questions PDF

- 1) A quality engineer wants to check the quality of steel rods produced in a steel factory. For this, 40 pieces of steel rods are randomly selected from the steel factory to assess their quality. Based on this, choose the correct option below: - The population is all steel rods produced in the...

- 1) A quality engineer wants to check the quality of steel rods produced in a steel factory. For this, 40 pieces of steel rods are randomly selected from the steel factory to assess their quality. Based on this, choose the correct option below: - The population is all steel rods produced in the given steel factory; the sample is the 40 steel rods selected from the given steel factory's production. - 2) Values of temperature and humidity of a room are measured for 24 hours at a regular time interval of 30 minutes. Based on this, choose the correct option from below: - It is time series data. - 3) Pin code is a numerical variable. - True - 4) In the 2011 Cricket ODI World Cup quarter-final match between India and Australia, a media organization estimated that Australia would beat India by 50 runs if Australia bats first, based on the information of matches played between the two teams previously. Which branch of statistics does the above analysis belong to? - Inferential Statistics - 5) A class teacher wants to collect feedback from students of the class. The teacher hands out a blank sheet to each student to obtain descriptive input and suggestions on the class. The data collected by the class teacher is: - Unstructured Data - 6) Variables with an interval scale of measurement may be converted into a ratio scale of measurement by performing? - Subtraction operation - 7) What is the scale of measurement for the amount of money you have? - Ratio - 8) What is the scale of measurement for the military titles - Major, Captain, Colonel? - Ordinal - 9) Which of the following statements is (are) true: - All basic mathematical operations can be performed on some structured data. - Email contents, text messages, and audio files are usually unstructured data. - Height(cm), Weight (Kg), Age(years) are structured data. - 10) Which of the following is (are) numerical variable(s)? - Height(cm) - Mobile number - Age in years - 11) Which of the following variables has (have) ratio scale of measurement? - Temperature in Kelvin - Angle measured in degrees - 12) Which of the following mathematical operation(s) can be performed on interval variables? - Addition - Subtraction - 13) Which of the following is (are) expected while selecting a sample for a population? - Sample should be a subset of the population. - Sample should be representative of the characteristics of different elements in the population. - 14) Which of the following operations can be valid for categorical variables? (More than one option can be correct) - Comparison (>, <, =) - 15) In a general election that happened in Guntur, 100% of the registered voters in the constituency participated in the election. The winner is decided to be independent candidate, Sudhakar, as he got nearly 60% of the votes. What kind of statistical analysis can be done using this data? - Descriptive Statistics - 16) A mobile manufacturing company received feedback from customers complaining mobiles bought were defective. To confirm this, the company randomly selected 100 mobile phones from the total mobile phones and checked for defectiveness of mobiles. Which of the following options is/are correct? - Descriptive Statistics can be done using this data. - Randomly selected 100 mobile phones is sample. - All mobile phones manufactured in company is population. - 17) Suppose a sample is collected and it is used to describe and summarize the sample, then the study is: - Descriptive - 18) For the conclusions made through inferential statistics to be correct, which of the following statement/s should be valid? - Sample should be randomly selected. - Sample should be a representative of population. - 19) Which of the following is/are numerical variables? - Height (m) - Stop watch time (in minutes) - 20) Which of the following variable/s have nominal scale of measurement? - PAN card number - Passenger Name Reservation (PNR) number - Vegetables - 21) Choose the correct statement/s from the following: - Revenue generated by India through tea exports to 10 different countries in year 2010 is a cross-sectional data. - Revenue generated by India during the period 2000-2010 is a time-series data.