Question 1

The difference between consecutive lower class or upper class limits of adjacent classes provides the

Accepted Answer

A)  number of classes. 
B)  class limits. 
C)  class midpoint. 
D)  class width. 
A)  number of classes. 
B)  class limits. 
C)  class midpoint. 
D)  class width.

Question 2

A sample of the class sizes of 10 statistics classes at a university is shown below.   ​
Construct a dot plot for the above data.

Accepted Answer

The answer of A sample of the class sizes of...

Question 3

The test scores of 14 individuals on their first statistics examination are shown below.   ​
Construct a stem-and-leaf display for these data.

Accepted Answer

The answer of The test scores of 14 individuals on...

Question 4

The percent frequency of a class is computed by

Accepted Answer

A)  multiplying the frequency by 100. 
B)  dividing the relative frequency by 100. 
C)  multiplying the relative frequency by 100. 
D)  dividing the frequency by 100. 
A)  multiplying the frequency by 100. 
B)  dividing the relative frequency by 100. 
C)  multiplying the relative frequency by 100. 
D)  dividing the frequency by 100.

Question 5

Which of the following is not a recommended guideline for creating an effective graphical display?​

Accepted Answer

A)  Give the display a clear and concise title 
B)  ​Use three dimensions whenever possible, to give the display depth 
C)  ​If colors are used to distinguish categories, use a legend to define them 
D)  ​Label each axis and show the units of measure 
A)  Give the display a clear and concise title 
B)  ​Use three dimensions whenever possible, to give the display depth 
C)  ​If colors are used to distinguish categories, use a legend to define them 
D)  ​Label each axis and show the units of measure

Question 6

In a cumulative percent frequency distribution, the last class will have a cumulative percent frequency equal to

Accepted Answer

A)  one. 
B)  100. 
C)  the total number of elements in the data set. 
D)  None of these alternatives is correct. 
A)  one. 
B)  100. 
C)  the total number of elements in the data set. 
D)  None of these alternatives is correct.

Question 7

In a scatter diagram, a line that provides an approximation of the relationship between the variables is known as a _____ line.

Accepted Answer

A)  determination 
B)  trend 
C)  control 
D)  zero-bias 
A)  determination 
B)  trend 
C)  control 
D)  zero-bias

Question 8

A researcher is gathering data from four geographical areas designated: South = 1; North = 2; East = 3; West =4. The designated geographical regions represent?

Accepted Answer

A)  ?categorical data. 
B)  ?quantitative data. 
C)  ?crosstabular data. 
D)  ?either categorical or quantitative data. 
A)  ?categorical data. 
B)  ?quantitative data. 
C)  ?crosstabular data. 
D)  ?either categorical or quantitative data.

Question 9

A graphical method that can be used to show both the rank order and shape of a distribution of data simultaneously is a​

Accepted Answer

A)  ​relative frequency distribution. 
B)  ​pie chart. 
C)  ​stem-and-leaf display. 
D)  ​dot plot. 
A)  ​relative frequency distribution. 
B)  ​pie chart. 
C)  ​stem-and-leaf display. 
D)  ​dot plot.

Question 10

The numbers of hours worked (per week) by 400 statistics students are shown below.   ​ The midpoint of the third class is

Accepted Answer

A)  25.5 
B)  24. 
C)  25. 
D)  24.5. 
A)  25.5 
B)  24. 
C)  25. 
D)  24.5.

Question 11

The following data set shows the number of hours of sick leave that some of the employees of Bastien's, Inc. have taken during the first quarter of the year (rounded to the nearest hour).   ​ 
a.
Develop a frequency distribution for the above data. (Let the width of your classes be 10 units and start your first class as 10 - 19.)
b.
Develop a relative frequency distribution and a percent frequency distribution for the data.
c.
Develop a cumulative frequency distribution.
d.
How many employees have taken less than 40 hours of sick leave?

Accepted Answer

The answer of The following data set shows the number...

Question 12

The numbers of hours worked (per week) by 400 statistics students are shown below.   ​ The relative frequency of students working 0 - 9 hours per week is

Accepted Answer

A)  .05 
B)  .20 
C)  .25 
D)  .50 
A)  .05 
B)  .20 
C)  .25 
D)  .50

Question 13

A sample of fifteen 7-year old boys shows their favorite superheroes:   ​ Which of the following is the correct frequency distribution?
​

Accepted Answer

A)  Spiderman 4, Batman 3, Iron Man 1, Aquaman 4, Captain America 3, Superman 1 
B)  Spiderman 6, Batman 2, Iron Man 2, Aquaman 2, Captain America 2, Superman 1 
C)  Spiderman 6, Batman 1, Iron Man 3, Aquaman 1, Captain America 2, Superman 2 
D)  None of these alternatives is correct. 
A)  Spiderman 4, Batman 3, Iron Man 1, Aquaman 4, Captain America 3, Superman 1 
B)  Spiderman 6, Batman 2, Iron Man 2, Aquaman 2, Captain America 2, Superman 1 
C)  Spiderman 6, Batman 1, Iron Man 3, Aquaman 1, Captain America 2, Superman 2 
D)  None of these alternatives is correct.

Question 14

​The approximate class width for a frequency distribution involving quantitative data can be determined using the expression

Accepted Answer

A)  ​mean frequency/total frequency. 
B)  ​total frequency/class midpoint. 
C)  ​range/desired number of classes. 
D)  ​desired number of classes/class midpoint. 
A)  ​mean frequency/total frequency. 
B)  ​total frequency/class midpoint. 
C)  ​range/desired number of classes. 
D)  ​desired number of classes/class midpoint.

Question 15

A sample of 15 children shows their favorite kind of pet: ​   ​
Which of the following distributions would be inappropriate for this data?

Accepted Answer

A)  Frequency 
B)  Relative frequency 
C)  Cumulative frequency 
D)  Percent frequency 
A)  Frequency 
B)  Relative frequency 
C)  Cumulative frequency 
D)  Percent frequency

Question 16

There are 800 students in the School of Business Administration. There are four majors in the School: Accounting, Finance, Management, and Marketing. The following shows the number of students in each major.   Develop a percent frequency distribution and construct a bar chart and a pie chart.

Accepted Answer

The answer of There are 800 students in the School...

Question 17

The numbers of hours worked (per week) by 400 statistics students are shown below.   ​ The percentage of students who work at least 20 hours per week is

Accepted Answer

A)  25%. 
B)  50%. 
C)  75%. 
D)  100%. 
A)  25%. 
B)  50%. 
C)  75%. 
D)  100%.

Question 18

You are given the following data on the age of employees at a company. Construct a stem-and-leaf display.

Accepted Answer

The answer of You are given the following data on...

Question 19

​Which of the following types of data cannot be appropriately displayed by a histogram?

Accepted Answer

A)  Frequency 
B)  Relative frequency 
C)  ​Cumulative frequency 
D)  ​Percent frequency 
A)  Frequency 
B)  Relative frequency 
C)  ​Cumulative frequency 
D)  ​Percent frequency

Question 20

A graphical tool typically associated with the display of key performance indicators is a

Accepted Answer

A)  side-by-side bar chart. 
B)  stem-and-leaf display. 
C)  stacked bar chart. 
D)  data dashboard. 
A)  side-by-side bar chart. 
B)  stem-and-leaf display. 
C)  stacked bar chart. 
D)  data dashboard.

Exam 2: Descriptive Statistics: Tabular and Graphical Displays

The difference between consecutive lower class or upper class limits of adjacent classes provides the

A sample of the class sizes of 10 statistics classes at a university is shown below. ​ Construct a dot plot for the above data.

The test scores of 14 individuals on their first statistics examination are shown below. ​ Construct a stem-and-leaf display for these data.

The percent frequency of a class is computed by

Which of the following is not a recommended guideline for creating an effective graphical display?​

In a cumulative percent frequency distribution, the last class will have a cumulative percent frequency equal to

In a scatter diagram, a line that provides an approximation of the relationship between the variables is known as a _____ line.

A researcher is gathering data from four geographical areas designated: South = 1; North = 2; East = 3; West =4. The designated geographical regions represent?

A graphical method that can be used to show both the rank order and shape of a distribution of data simultaneously is a​

The numbers of hours worked (per week) by 400 statistics students are shown below. ​ The midpoint of the third class is

The numbers of hours worked (per week) by 400 statistics students are shown below. ​ The relative frequency of students working 0 - 9 hours per week is

A sample of fifteen 7-year old boys shows their favorite superheroes: ​ Which of the following is the correct frequency distribution? ​

​The approximate class width for a frequency distribution involving quantitative data can be determined using the expression

A sample of 15 children shows their favorite kind of pet: ​ ​ Which of the following distributions would be inappropriate for this data?

There are 800 students in the School of Business Administration. There are four majors in the School: Accounting, Finance, Management, and Marketing. The following shows the number of students in each major. Develop a percent frequency distribution and construct a bar chart and a pie chart.

The numbers of hours worked (per week) by 400 statistics students are shown below. ​ The percentage of students who work at least 20 hours per week is

You are given the following data on the age of employees at a company. Construct a stem-and-leaf display.

​Which of the following types of data cannot be appropriately displayed by a histogram?

A graphical tool typically associated with the display of key performance indicators is a

Data and Statistics

Descriptive Statistics: Numerical Measures

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Comparing Multiple Proportions, Tests of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Regression Analysis: Model Building

Time Series Analysis and Forecasting

Nonparametric Methods

Decision Analysis

Index Numbers

Statistical Methods for Quality Control

Sample Survey

Filters

A sample of the class sizes of 10 statistics classes at a university is shown below. Construct a dot plot for the above data.

The test scores of 14 individuals on their first statistics examination are shown below. Construct a stem-and-leaf display for these data.

Which of the following is not a recommended guideline for creating an effective graphical display?

A graphical method that can be used to show both the rank order and shape of a distribution of data simultaneously is a

The numbers of hours worked (per week) by 400 statistics students are shown below. The midpoint of the third class is

The numbers of hours worked (per week) by 400 statistics students are shown below. The relative frequency of students working 0 - 9 hours per week is

A sample of fifteen 7-year old boys shows their favorite superheroes: Which of the following is the correct frequency distribution?

The approximate class width for a frequency distribution involving quantitative data can be determined using the expression

A sample of 15 children shows their favorite kind of pet: Which of the following distributions would be inappropriate for this data?

The numbers of hours worked (per week) by 400 statistics students are shown below. The percentage of students who work at least 20 hours per week is

Which of the following types of data cannot be appropriately displayed by a histogram?