Question 1

The numbers of hours worked (per week) by 400 statistics students are shown below.   ​ The cumulative percent frequency for < 29 hours is

Accepted Answer

A)  50. 
B)  75. 
C)  200. 
D)  300. 
A)  50. 
B)  75. 
C)  200. 
D)  300.

Question 2

The relative frequency of a class is computed by

Accepted Answer

A)  dividing the midpoint of the class by the sample size. 
B)  dividing the frequency of the class by the midpoint. 
C)  dividing the sample size by the frequency of the class. 
D)  dividing the frequency of the class by the sample size. 
A)  dividing the midpoint of the class by the sample size. 
B)  dividing the frequency of the class by the midpoint. 
C)  dividing the sample size by the frequency of the class. 
D)  dividing the frequency of the class by the sample size.

Question 3

​A graphical device for depicting categorical data that have been summarized in a frequency distribution, relative frequency distribution, or percent frequency distribution is a

Accepted Answer

A)  ​histogram. 
B)  ​stem-and-leaf display. 
C)  ​dot plot. 
D)  ​bar chart. 
A)  ​histogram. 
B)  ​stem-and-leaf display. 
C)  ​dot plot. 
D)  ​bar chart.

Question 4

Fifteen percent of the students in a school of Business Administration are majoring in Economics, 20% in Finance, 35% in Management, and 30% in Accounting. The graphical device(s) which can be used to present these data is (are)

Accepted Answer

A)  a line chart. 
B)  only a bar chart. 
C)  only a pie chart. 
D)  both a bar chart and a pie chart. 
A)  a line chart. 
B)  only a bar chart. 
C)  only a pie chart. 
D)  both a bar chart and a pie chart.

Question 5

The numbers of hours worked on homework (per week) by 400 statistics students are shown below.   ​ The class width used in this frequency distribution is

Accepted Answer

A)  2. 
B)  2.5. 
C)  4. 
D)  5. 
A)  2. 
B)  2.5. 
C)  4. 
D)  5.

Question 6

Data that indicate how much or how many are known as​

Accepted Answer

A)  ​categorical data. 
B)  ​quantitative data. 
C)  ​relative data. 
D)  ​cumulative data. 
A)  ​categorical data. 
B)  ​quantitative data. 
C)  ​relative data. 
D)  ​cumulative data.

Question 7

Before drawing any conclusions about the relationship between two variables shown in a crosstabulation, you should​

Accepted Answer

A)  ​investigate whether any hidden variables could affect the conclusions. 
B)  ​construct a scatter diagram and find the trendline. 
C)  ​develop a relative frequency distribution. 
D)  ​construct a dot plot and look for significant gaps. 
A)  ​investigate whether any hidden variables could affect the conclusions. 
B)  ​construct a scatter diagram and find the trendline. 
C)  ​develop a relative frequency distribution. 
D)  ​construct a dot plot and look for significant gaps.

Question 8

The proper way to construct a stem-and-leaf display for the data set {62, 67, 68, 73, 73, 79, 91, 94, 95, 97} is to​

Accepted Answer

A)  ​exclude a stem labeled '8. 
B)  ​include a stem labeled '8' and enter no leaves on the stem. 
C)  ​include a stem labeled '(8)' and enter no leaves on the stem. 
D)  ​include a stem labeled '8' and enter one leaf value of '0' on the stem. 
A)  ​exclude a stem labeled '8. 
B)  ​include a stem labeled '8' and enter no leaves on the stem. 
C)  ​include a stem labeled '(8)' and enter no leaves on the stem. 
D)  ​include a stem labeled '8' and enter one leaf value of '0' on the stem.

Question 9

The sales records of a real estate company for the month of May shows the following house prices (rounded to the nearest $1,000). Values are in thousands of dollars.   ​ 
a.
Develop a frequency distribution and a percent frequency distribution for the house prices. (Use 5 classes and have your first class be 20 - 39.)
b.
Develop a cumulative frequency and a cumulative percent frequency distribution for the above data.
c.
What percentage of the houses are sold at a price below $80,000?

Accepted Answer

The answer of The sales records of a real estate...

Question 10

Data that provide labels or names for categories of like items are known as _____ data.

Accepted Answer

A)  categorical 
B)  quantitative 
C)  labeled 
D)  qualitative 
A)  categorical 
B)  quantitative 
C)  labeled 
D)  qualitative

Question 11

A sample of 15 children shows their favorite kind of pet: ​   ​
Which of the following displays is most appropriate for this data?

Accepted Answer

A)  Side-by-side bar chart 
B)  Histogram 
C)  Stacked bar chart 
D)  Pie chart 
A)  Side-by-side bar chart 
B)  Histogram 
C)  Stacked bar chart 
D)  Pie chart

Question 12

Thirty students in the School of Business were asked what their majors were. The following represents their responses (M = Management; A = Accounting; E = Economics; O = Others).   ​ 
a.
Construct a frequency distribution and a bar chart.
b.
Construct a relative frequency distribution and a pie chart.

Accepted Answer

The answer of Thirty students in the School of Business...

Question 13

​If several frequency distributions are constructed from the same data set, the distribution with the widest class width will have the

Accepted Answer

A)  ​fewest classes. 
B)  ​most classes. 
C)  ​smallest total frequency. 
D)  ​largest total frequency. 
A)  ​fewest classes. 
B)  ​most classes. 
C)  ​smallest total frequency. 
D)  ​largest total frequency.

Question 14

Which of the following graphical methods shows the relationship between two variables?

Accepted Answer

A)  Pie chart 
B)  Histogram 
C)  Crosstabulation 
D)  Dot plot 
A)  Pie chart 
B)  Histogram 
C)  Crosstabulation 
D)  Dot plot

Question 15

For stem-and-leaf displays where the leaf unit is not stated, the leaf unit is assumed to equal​

Accepted Answer

A)  ​0. 
B)  ​-1. 
C)  ​1. 
D)  ​10. 
A)  ​0. 
B)  ​-1. 
C)  ​1. 
D)  ​10.

Question 16

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

Accepted Answer

A)  one. 
B)  100%. 
C)  the total number of elements in the data set. 
D)  the total of classes in the data set. 
A)  one. 
B)  100%. 
C)  the total number of elements in the data set. 
D)  the total of classes in the data set.

Question 17

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

Accepted Answer

A)  one. 
B)  100%. 
C)  the total number of elements in the data set. 
D)  the class width. 
A)  one. 
B)  100%. 
C)  the total number of elements in the data set. 
D)  the class width.

Question 18

​Histograms based on data on housing prices and salaries typically are

Accepted Answer

A)  ​skewed to the left. 
B)  ​skewed to the right. 
C)  ​stacked. 
D)  ​symmetric. 
A)  ​skewed to the left. 
B)  ​skewed to the right. 
C)  ​stacked. 
D)  ​symmetric.

Question 19

The most common graphical presentation of quantitative data is a

Accepted Answer

A)  histogram. 
B)  bar chart. 
C)  dot plot. 
D)  pie chart. 
A)  histogram. 
B)  bar chart. 
C)  dot plot. 
D)  pie chart.

Question 20

Which of the following is a graphical summary of a set of data in which each data value is represented by a dot above the axis?

Accepted Answer

A)  Histogram 
B)  Pie chart 
C)  Dot plot 
D)  Crosstabulation 
A)  Histogram 
B)  Pie chart 
C)  Dot plot 
D)  Crosstabulation

Exam 2: Descriptive Statistics: Tabular and Graphical Displays

The numbers of hours worked (per week) by 400 statistics students are shown below. ​ The cumulative percent frequency for < 29 hours is

The relative frequency of a class is computed by

​A graphical device for depicting categorical data that have been summarized in a frequency distribution, relative frequency distribution, or percent frequency distribution is a

Fifteen percent of the students in a school of Business Administration are majoring in Economics, 20% in Finance, 35% in Management, and 30% in Accounting. The graphical device(s) which can be used to present these data is (are)

The numbers of hours worked on homework (per week) by 400 statistics students are shown below. ​ The class width used in this frequency distribution is

Data that indicate how much or how many are known as​

Before drawing any conclusions about the relationship between two variables shown in a crosstabulation, you should​

The proper way to construct a stem-and-leaf display for the data set {62, 67, 68, 73, 73, 79, 91, 94, 95, 97} is to​

Data that provide labels or names for categories of like items are known as _____ data.

A sample of 15 children shows their favorite kind of pet: ​ ​ Which of the following displays is most appropriate for this data?

​If several frequency distributions are constructed from the same data set, the distribution with the widest class width will have the

Which of the following graphical methods shows the relationship between two variables?

For stem-and-leaf displays where the leaf unit is not stated, the leaf unit is assumed to equal​

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

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

​Histograms based on data on housing prices and salaries typically are

The most common graphical presentation of quantitative data is a

Which of the following is a graphical summary of a set of data in which each data value is represented by a dot above the axis?

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

The numbers of hours worked (per week) by 400 statistics students are shown below. The cumulative percent frequency for < 29 hours is

A graphical device for depicting categorical data that have been summarized in a frequency distribution, relative frequency distribution, or percent frequency distribution is a

The numbers of hours worked on homework (per week) by 400 statistics students are shown below. The class width used in this frequency distribution is

Data that indicate how much or how many are known as

Before drawing any conclusions about the relationship between two variables shown in a crosstabulation, you should

The proper way to construct a stem-and-leaf display for the data set {62, 67, 68, 73, 73, 79, 91, 94, 95, 97} is to

A sample of 15 children shows their favorite kind of pet: Which of the following displays is most appropriate for this data?

If several frequency distributions are constructed from the same data set, the distribution with the widest class width will have the

For stem-and-leaf displays where the leaf unit is not stated, the leaf unit is assumed to equal

Histograms based on data on housing prices and salaries typically are