Business Analytics - Chapter 2 Quiz

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A quantity of interest that can take on different values is known as a(n) _____.

variable (correct)

parameter

sample

observation

A set of values corresponding to a set of variables is defined as a(n) _____.

quantity

event

factor

observation (correct)

The difference in a variable measured over observations (time, customers, items, etc.) is known as _____.

observed differences

variation (correct)

variable change

descriptive analytics

_____ acts as a representative of the population.

A sample Signup and view all the answers

The act of collecting data that are representative of the population data is called _____.

random sampling Signup and view all the answers

The letter grades (A, B, C, D, F) of business analysis students are recorded by a professor. This variable’s classification _____.

is categorical data Signup and view all the answers

The amount of time taken by each of 10 students in a class to complete an exam is an example of what type of data?

Quantitative data Signup and view all the answers

_____ are collected from several entities at the same point in time.

Cross-sectional data Signup and view all the answers

Data collected from several entities over a period of time (minutes, hours, days, etc.) are called _____.

time series data Signup and view all the answers

In a(n) _____, one or more variables are identified and controlled or manipulated so that data can be obtained about how they influence the variable of interest identified first.

experimental study Signup and view all the answers

The data collected from the customers in restaurants about the quality of food is an example of a(n) _____.

observational study Signup and view all the answers

When working with large spreadsheets with many rows of data, it can be helpful to _____the data to better find, view, or manage subsets of data.

sort and filter Signup and view all the answers

When working with data sets in Excel, _____ can be used to automatically highlight cells that meet specified requirements.

conditional formatting Signup and view all the answers

A summary of data that shows the number of observations in each of several nonoverlapping bins is called a(n) _____.

frequency distribution Signup and view all the answers

Which of the following gives the proportion of items in each bin?

Relative frequency Signup and view all the answers

Compute the relative frequencies for the data given in the table below:

Grades | Number of students A 16 B 28 C 33 D 13 Total 90

0.18, 0.31, 0.37, 0.14 Signup and view all the answers

Consider the data below. What percentage of students scored grade C?

Grades | Number of students A 16 B 28 C 33 D 13 Total 90

37% Signup and view all the answers

Which of the following are necessary to be determined to define the classes for a frequency distribution with quantitative data?

Number of nonoverlapping bins, width of each bin, and bin limits Signup and view all the answers

The goal regarding using an appropriate number of bins is to show the _____.

variation in the data Signup and view all the answers

A _____ is a graphical summary of data previously summarized in a frequency distribution.

histogram Signup and view all the answers

Identify the shape of the distribution in the figure below.

Skewed right Signup and view all the answers

The _____ shows the number of data items with values less than or equal to the upper class limit of each class.

cumulative frequency distribution Signup and view all the answers

The _____ is a point estimate of the population mean for the variable of interest.

sample mean Signup and view all the answers

Compute the mean of the following data.

56, 42, 37, 29, 45, 51, 30, 25, 34, 57

40.6 Signup and view all the answers

Compute the median of the following data.

32, 41, 36, 24, 29, 30, 40, 22, 25, 37

31 Signup and view all the answers

Compute the mode for the following data.

12, 16, 19, 10, 12, 11, 21, 12, 21, 10

12 Signup and view all the answers

Compute the geometric mean for the following data on growth factors of an investment for 10 years.

1.10, 0.50, 0.70, 1.21, 1.25, 1.12, 1.16, 1.11, 1.13, 1.22

1.0148 Signup and view all the answers

The simplest measure of variability is the _____.

range Signup and view all the answers

The variance is based on the

deviation about the mean. Signup and view all the answers

Use technology to compute the standard deviation for the following sample data.

32, 41, 36, 24, 29, 30, 40, 22, 25, 37

6.75 Signup and view all the answers

Compute the coefficient of variation for the following sample data.

32, 41, 36, 24, 29, 30, 40, 22, 25, 37

21.36% Signup and view all the answers

Compute the 50th percentile for the following data.

10, 15, 17, 21, 25, 12, 16, 11, 13, 22

15.5 Signup and view all the answers

Compute the third quartile for the following data.

10, 15, 17, 21, 25, 12, 16, 11, 13, 22

21.25 Signup and view all the answers

Compute the IQR for the following data.

10, 15, 17, 21, 25, 12, 16, 11, 13, 22

9.50 Signup and view all the answers

A _____ determines how far a particular value is from the mean relative to the data set’s standard deviation.

z-score Signup and view all the answers

For data having a bell-shaped distribution, approximately _____ percent of the data values will be within one standard deviation of the mean.

68 Signup and view all the answers

Any data value with a z-score less than –3 or greater than +3 is considered to be a(n) _____.

outlier Signup and view all the answers

Which of the following graphs provides information on outliers and IQR of a data set?

Box plot Signup and view all the answers

If the covariance between two variables is near 0, it implies that ______.

the variables are not linearly related Signup and view all the answers

The correlation coefficient will always take values _____.

between –1 and +1 Signup and view all the answers

Scores on Ms. Bond's test have a mean of 70 and a standard deviation of 11. Michelle has a score of 48. Convert Michelle's score to a z-score. (Round to two decimal places if necessary.)

–2 Signup and view all the answers

Scores on Ms. Nash's test have a mean of 64 and a standard deviation of 9. Steve has a score of 52. Convert Steve's score to a z-score. (Round to two decimal places if necessary.)

–1.33 Signup and view all the answers

Scores on Ms. Bond's test have a mean of 70 and a standard deviation of 11. David has a score of 52 on Ms. Bond's test. Scores on Ms. Nash's test have a mean of 64 and a standard deviation of 6. Steven has a score of 52 on Ms. Nash's test. Which student has the higher standardized score?

David's standardized score is –1.64 and Steven's standardized score is –2.00. Therefore, Steven has the higher standardized score. Signup and view all the answers

The College Board originally scaled SAT scores so that the scores for each section were approximately normally distributed with a mean of 500 and a standard deviation of 100. Assuming scores follow a bell-shaped distribution, use the empirical rule to find the percentage of students who scored greater than 700.

2.5% Signup and view all the answers

TheCollegeBoardoriginallyscaledSATscoressothatthescoresforeachsectionwereapproximatelynormallydistributedwith a meanof500and a standarddeviationof100.Assuming scores follow a bell-shapeddistribution,usetheempiricalruletofindthepercentageofstudentswhoscoredlessthan400.

16% Signup and view all the answers

The College Board reported that the mean Math Level 2 SAT subject test score was 686 with a standard deviation of 96. Assuming scores followa bell-shapeddistribution, usetheempiricalrule tofindthepercentageofstudentswhoscoredlessthan494.

2.5% Signup and view all the answers

Compute the relative frequency for students who earned an A shown in the table of grades below. Grades | Number of Students A 10 B 31 C 36 D 6 | 83

0.12 Signup and view all the answers

Compute the relative frequency for students who earned a C shown in the table of grades below. Grades | Number of Students A 10 B 31 C 36 D 6 | 83

0.43 Signup and view all the answers

Below is a histogram for the number of days that it took Wyche Accounting to perform audits in the last quarter of last year. What is the relative frequency of the 21-24 bin?

0.25 Signup and view all the answers

Below is a histogram for the number of days that it took Wyche Accounting to perform audits in the last quarter of last year. What is the frequency of the 25-28 bin?

1 Signup and view all the answers

What is the total relative frequency? 20XX Contest Sales

Salesman | Frequency | Relative Frequency Frances Clonts 15 0.05 Sarah Leigh 184 0.62 Devon Pride 37 John Townes 62 0.21 Total 298

1 Signup and view all the answers

Below is a histogram for the number of days that it took Wyche Accounting to perform audits in the last quarter of last year. What is the bin size for the histogram?

4 Signup and view all the answers

Select the histogram that is moderately skewed right.

B Signup and view all the answers

Which graph represents a negative linear relationship between x and y?

C Signup and view all the answers

Below is the data for the number of days that it took Wyche Accounting to perform audits in the last quarter of last year.

56, 42, 37, 29, 45, 51, 30, 25, 34, 57

What is the median number of days that it took Wyche Accounting to perform audits in the last quarter of last year?

39.5 Signup and view all the answers

What is the mode of the data set given below?

35, 47, 65, 47, 22

47 Signup and view all the answers

A sample of 13 adult males’ heights are listed below.

70, 72, 71, 70, 69, 73, 69, 68, 70, 71, 67, 71, 74

Find the range of the data.

7 Signup and view all the answers

James’s manager asked him to sort the last names in the following list in descending order. What does this mean?

The last names must be sorted from Z to A. Signup and view all the answers

You have been asked to reorganize the Excel table below into order of sales using the Sales column. Which option will allow you to do this quickly?

Use the Sort function to organize the data into order of sales. Signup and view all the answers

Which Excel command will return all modes when more than one mode exists?

MODE.MULT Signup and view all the answers

In a survey of patients in a local hospital, 62.42% of the respondents indicated that the health care providers needed to spend more time with each patient. Who makes up the population?

All patients in a local hospital Signup and view all the answers

In a survey of patients in a local hospital, 62.42% of the respondents indicated that the health care providers needed to spend more time with each patient. Who makes up the sample?

All survey respondents Signup and view all the answers

A manager of a fast food restaurant wants the drive-thru employee to ask every fifth customer if he or she is satisfied with the service. Who makes up the population?

All customers who use the drive-thru window of this fast food restaurant Signup and view all the answers

A manager of a fast food restaurant wants the drive-thru employee to ask every fifth customer if he or she is satisfied with the service. Who makes up the sample?

All survey respondents Signup and view all the answers

Which of the following relationships would have a negative correlation coefficient?

Supply and demand Signup and view all the answers

The distribution of hourly sales for a local family owned store is normally distributed with a mean of $225 per hour and a standard deviation of $75 per hour. Which of the following intervals contains the middle 95% of hourly sales?

$75 to $375 Signup and view all the answers

Data sets commonly include observations with missing values for one or more variables. In some cases missing data naturally occur; these are called _____.

legitimately missing data Signup and view all the answers

_____ is the process of removing variables from the analysis without losing crucial information.

Dimension reduction Signup and view all the answers

A student willing to participate in a debate competition is required to fill out a registration form. State whether each of the following information about the participant provides categorical or quantitative data.

What is your birth month?

Categorical Signup and view all the answers

A student willing to participate in a debate competition is required to fill out a registration form. State whether each of the following information about the participant provides categorical or quantitative data.

Have you participated in any debate competition previously?

Categorical Signup and view all the answers

A student willing to participate in a debate competition is required to fill out a registration form. State whether each of the following information about the participant provides categorical or quantitative data. how many debate competitions have you participated so far?

Quantitative Signup and view all the answers

A student willing to participate in a debate competition is required to fill out a registration form. State whether each of the following information about the participant provides categorical or quantitative data. Have you won any of the competitions?

Categorical Signup and view all the answers

What is(are) the mode(s) of the following data set?

35, 42, 65, 42, 22

42 Signup and view all the answers

You would __________ a table if you wanted to display only data that match specific criteria.

filter Signup and view all the answers

The Excel function STANDARDIZE can be used to calculate ____________.

z-scores Signup and view all the answers

The difference between the largest and the smallest data values is the __________.

range Signup and view all the answers

The ___________ measures the variability of the middle 50% of a data set.

IQR Signup and view all the answers

Business Analytics - Chapter 2 Quiz

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Questions and Answers

A quantity of interest that can take on different values is known as a(n) _____.

A set of values corresponding to a set of variables is defined as a(n) _____.

The difference in a variable measured over observations (time, customers, items, etc.) is known as _____.

_____ acts as a representative of the population.

The act of collecting data that are representative of the population data is called _____.

The letter grades (A, B, C, D, F) of business analysis students are recorded by a professor. This variable’s classification _____.

The amount of time taken by each of 10 students in a class to complete an exam is an example of what type of data?

_____ are collected from several entities at the same point in time.

Data collected from several entities over a period of time (minutes, hours, days, etc.) are called _____.

In a(n) _____, one or more variables are identified and controlled or manipulated so that data can be obtained about how they influence the variable of interest identified first.

The data collected from the customers in restaurants about the quality of food is an example of a(n) _____.

When working with large spreadsheets with many rows of data, it can be helpful to _____the data to better find, view, or manage subsets of data.

When working with data sets in Excel, _____ can be used to automatically highlight cells that meet specified requirements.

A summary of data that shows the number of observations in each of several nonoverlapping bins is called a(n) _____.

Which of the following gives the proportion of items in each bin?

Compute the relative frequencies for the data given in the table below: Grades | Number of students A 16 B 28 C 33 D 13 Total 90

Consider the data below. What percentage of students scored grade C? Grades | Number of students A 16 B 28 C 33 D 13 Total 90

Which of the following are necessary to be determined to define the classes for a frequency distribution with quantitative data?

The goal regarding using an appropriate number of bins is to show the _____.

A _____ is a graphical summary of data previously summarized in a frequency distribution.

Identify the shape of the distribution in the figure below.

The _____ shows the number of data items with values less than or equal to the upper class limit of each class.

The _____ is a point estimate of the population mean for the variable of interest.

Compute the mean of the following data. 56, 42, 37, 29, 45, 51, 30, 25, 34, 57

Compute the median of the following data. 32, 41, 36, 24, 29, 30, 40, 22, 25, 37

Compute the mode for the following data. 12, 16, 19, 10, 12, 11, 21, 12, 21, 10

Compute the geometric mean for the following data on growth factors of an investment for 10 years. 1.10, 0.50, 0.70, 1.21, 1.25, 1.12, 1.16, 1.11, 1.13, 1.22

The simplest measure of variability is the _____.

The variance is based on the

Use technology to compute the standard deviation for the following sample data. 32, 41, 36, 24, 29, 30, 40, 22, 25, 37

Compute the coefficient of variation for the following sample data. 32, 41, 36, 24, 29, 30, 40, 22, 25, 37

Compute the 50th percentile for the following data. 10, 15, 17, 21, 25, 12, 16, 11, 13, 22

Compute the third quartile for the following data. 10, 15, 17, 21, 25, 12, 16, 11, 13, 22

Compute the IQR for the following data. 10, 15, 17, 21, 25, 12, 16, 11, 13, 22

A _____ determines how far a particular value is from the mean relative to the data set’s standard deviation.

For data having a bell-shaped distribution, approximately _____ percent of the data values will be within one standard deviation of the mean.

Any data value with a z-score less than –3 or greater than +3 is considered to be a(n) _____.

Which of the following graphs provides information on outliers and IQR of a data set?

If the covariance between two variables is near 0, it implies that ______.

The correlation coefficient will always take values _____.

Scores on Ms. Bond's test have a mean of 70 and a standard deviation of 11. Michelle has a score of 48. Convert Michelle's score to a z-score. (Round to two decimal places if necessary.)

Scores on Ms. Nash's test have a mean of 64 and a standard deviation of 9. Steve has a score of 52. Convert Steve's score to a z-score. (Round to two decimal places if necessary.)

Scores on Ms. Bond's test have a mean of 70 and a standard deviation of 11. David has a score of 52 on Ms. Bond's test. Scores on Ms. Nash's test have a mean of 64 and a standard deviation of 6. Steven has a score of 52 on Ms. Nash's test. Which student has the higher standardized score?

TheCollegeBoardoriginallyscaledSATscoressothatthescoresforeachsectionwereapproximatelynormallydistributedwith a meanof500and a standarddeviationof100.Assuming scores follow a bell-shapeddistribution,usetheempiricalruletofindthepercentageofstudentswhoscoredlessthan400.

The College Board reported that the mean Math Level 2 SAT subject test score was 686 with a standard deviation of 96. Assuming scores followa bell-shapeddistribution, usetheempiricalrule tofindthepercentageofstudentswhoscoredlessthan494.

Compute the relative frequency for students who earned an A shown in the table of grades below. ​ Grades | Number of Students A 10 B 31 C 36 D 6 | 83

Compute the relative frequency for students who earned a C shown in the table of grades below. ​ Grades | Number of Students A 10 B 31 C 36 D 6 | 83

Below is a histogram for the number of days that it took Wyche Accounting to perform audits in the last quarter of last year. What is the relative frequency of the 21-24 bin?

Below is a histogram for the number of days that it took Wyche Accounting to perform audits in the last quarter of last year. What is the frequency of the 25-28 bin?

What is the total relative frequency? 20XX Contest Sales Salesman | Frequency | Relative Frequency Frances Clonts 15 0.05 Sarah Leigh 184 0.62 Devon Pride 37 John Townes 62 0.21 Total 298

Below is a histogram for the number of days that it took Wyche Accounting to perform audits in the last quarter of last year. What is the bin size for the histogram?

Select the histogram that is moderately skewed right.

Which graph represents a negative linear relationship between x and y?

Below is the data for the number of days that it took Wyche Accounting to perform audits in the last quarter of last year. 56, 42, 37, 29, 45, 51, 30, 25, 34, 57 What is the median number of days that it took Wyche Accounting to perform audits in the last quarter of last year?

What is the mode of the data set given below? 35, 47, 65, 47, 22

A sample of 13 adult males’ heights are listed below. 70, 72, 71, 70, 69, 73, 69, 68, 70, 71, 67, 71, 74 Find the range of the data.

James’s manager asked him to sort the last names in the following list in descending order. What does this mean?

You have been asked to reorganize the Excel table below into order of sales using the Sales column. Which option will allow you to do this quickly?

Which Excel command will return all modes when more than one mode exists?

In a survey of patients in a local hospital, 62.42% of the respondents indicated that the health care providers needed to spend more time with each patient. Who makes up the population?

In a survey of patients in a local hospital, 62.42% of the respondents indicated that the health care providers needed to spend more time with each patient. Who makes up the sample?

A manager of a fast food restaurant wants the drive-thru employee to ask every fifth customer if he or she is satisfied with the service. Who makes up the population?

A manager of a fast food restaurant wants the drive-thru employee to ask every fifth customer if he or she is satisfied with the service. Who makes up the sample?

Which of the following relationships would have a negative correlation coefficient?

The distribution of hourly sales for a local family owned store is normally distributed with a mean of $225 per hour and a standard deviation of $75 per hour. Which of the following intervals contains the middle 95% of hourly sales?

Data sets commonly include observations with missing values for one or more variables. In some cases missing data naturally occur; these are called _____.

_____ is the process of removing variables from the analysis without losing crucial information.

A student willing to participate in a debate competition is required to fill out a registration form. State whether each of the following information about the participant provides categorical or quantitative data. What is your birth month?

A student willing to participate in a debate competition is required to fill out a registration form. State whether each of the following information about the participant provides categorical or quantitative data. Have you participated in any debate competition previously?

A student willing to participate in a debate competition is required to fill out a registration form. State whether each of the following information about the participant provides categorical or quantitative data. how many debate competitions have you participated so far?

A student willing to participate in a debate competition is required to fill out a registration form. State whether each of the following information about the participant provides categorical or quantitative data. Have you won any of the competitions?

What is(are) the mode(s) of the following data set? 35, 42, 65, 42, 22

You would __________ a table if you wanted to display only data that match specific criteria.

The Excel function STANDARDIZE can be used to calculate ____________.

The difference between the largest and the smallest data values is the __________.

The ___________ measures the variability of the middle 50% of a data set.

Compute the relative frequencies for the data given in the table below:

Grades | Number of students A 16 B 28 C 33 D 13 Total 90

Consider the data below. What percentage of students scored grade C?

Grades | Number of students A 16 B 28 C 33 D 13 Total 90

Compute the mean of the following data.

56, 42, 37, 29, 45, 51, 30, 25, 34, 57

Compute the median of the following data.

32, 41, 36, 24, 29, 30, 40, 22, 25, 37

Compute the mode for the following data.

12, 16, 19, 10, 12, 11, 21, 12, 21, 10

Compute the geometric mean for the following data on growth factors of an investment for 10 years.

1.10, 0.50, 0.70, 1.21, 1.25, 1.12, 1.16, 1.11, 1.13, 1.22

Use technology to compute the standard deviation for the following sample data.

32, 41, 36, 24, 29, 30, 40, 22, 25, 37

Compute the coefficient of variation for the following sample data.

32, 41, 36, 24, 29, 30, 40, 22, 25, 37

Compute the 50th percentile for the following data.

10, 15, 17, 21, 25, 12, 16, 11, 13, 22

Compute the third quartile for the following data.

10, 15, 17, 21, 25, 12, 16, 11, 13, 22

Compute the IQR for the following data.

10, 15, 17, 21, 25, 12, 16, 11, 13, 22

Compute the relative frequency for students who earned an A shown in the table of grades below. Grades | Number of Students A 10 B 31 C 36 D 6 | 83

Compute the relative frequency for students who earned a C shown in the table of grades below. Grades | Number of Students A 10 B 31 C 36 D 6 | 83

What is the total relative frequency? 20XX Contest Sales

Salesman | Frequency | Relative Frequency Frances Clonts 15 0.05 Sarah Leigh 184 0.62 Devon Pride 37 John Townes 62 0.21 Total 298

Below is the data for the number of days that it took Wyche Accounting to perform audits in the last quarter of last year.

56, 42, 37, 29, 45, 51, 30, 25, 34, 57

What is the median number of days that it took Wyche Accounting to perform audits in the last quarter of last year?

What is the mode of the data set given below?

35, 47, 65, 47, 22

A sample of 13 adult males’ heights are listed below.

70, 72, 71, 70, 69, 73, 69, 68, 70, 71, 67, 71, 74

Find the range of the data.

A student willing to participate in a debate competition is required to fill out a registration form. State whether each of the following information about the participant provides categorical or quantitative data.

What is your birth month?

A student willing to participate in a debate competition is required to fill out a registration form. State whether each of the following information about the participant provides categorical or quantitative data.

Have you participated in any debate competition previously?

What is(are) the mode(s) of the following data set?

35, 42, 65, 42, 22