Question 1

The total area of the six bars in a relative frequency histogram for which the width of each bar is five units is 5.

Accepted Answer

A) True 
 B)False

Question 2

If the manager of a grocery store wishes to display the sales trend, the most effective type of graph will be:

Accepted Answer

A)  a bar chart 
B)  a pie chart 
C)  a histogram 
D)  a line chart 
E)  all of these 
A)  a bar chart 
B)  a pie chart 
C)  a histogram 
D)  a line chart 
E)  all of these

Question 3

The four classes: p to < 5, 5 to < 10, 10 to < 20, over 20, would be acceptable for developing a frequency distribution.

Accepted Answer

A) True 
 B)False

Question 4

Descriptive statistics deals with methods of:

Accepted Answer

A)  organizing data 
B)  summarizing data 
C)  presenting data in a convenient and informative way 
D)  all of these 
E)  only organizing and summarizing data 
A)  organizing data 
B)  summarizing data 
C)  presenting data in a convenient and informative way 
D)  all of these 
E)  only organizing and summarizing data

Question 5

Which of the following is not the goal of descriptive statistics?

Accepted Answer

A)  summarizing data 
B)  displaying aspects of the collected data 
C)  reporting numerical findings 
D)  estimating characteristics of the population based on a sample 
E)  none of these 
A)  summarizing data 
B)  displaying aspects of the collected data 
C)  reporting numerical findings 
D)  estimating characteristics of the population based on a sample 
E)  none of these

Question 6

When constructing a relative frequency distribution, if the data are discrete, it will always be necessary to develop class boundaries.

Accepted Answer

A) True 
 B)False

Question 7

Statistical inference is the process of making an estimate, prediction, or decision about a population based on sample data.

Accepted Answer

A) True 
 B)False

Question 8

A histogram is usually used to display which of the following characteristics for a quantitative variable?

Accepted Answer

A)  the shape of the distribution 
B)  the spread or variability in the data 
C)  the approximate center of the data 
D)  the spread or variability in the data and the approximate center of the data 
E)  all of these 
A)  the shape of the distribution 
B)  the spread or variability in the data 
C)  the approximate center of the data 
D)  the spread or variability in the data and the approximate center of the data 
E)  all of these

Question 9

A neighborhood ice cream vendor would like to see if there is a relationship between day of the week and the number of children buying ice cream from her. The following data represent the number of children buying ice cream on each of the seven days of a particular week:   
a. Construct a line chart to describe the data.
b. Is there any apparent trend in the data?
________________________________________________________

Accepted Answer

@#IMG-DLM& The number of children buying

Question 10

A continuous quantitative variable is one that can assume values at all points on an interval of values, with no gaps between possible values.

Accepted Answer

A) True 
 B)False

Question 11

You asked ten of your classmates about their weight. On the basis of this information, you stated that the average weight of all students in your university or college is 158 pounds. This is an example of:

Accepted Answer

A)  descriptive statistics 
B)  statistical inference 
C)  sample 
D)  population 
E)  sample and population 
A)  descriptive statistics 
B)  statistical inference 
C)  sample 
D)  population 
E)  sample and population

Question 12

Groupings of data, created to enhance an understanding of them, usually by making the groups collectively exhaustive and mutually exclusive are called classes or categories.

Accepted Answer

A) True 
 B)False

Question 13

A relative frequency distribution describes the proportion of data values that fall within each category.

Accepted Answer

A) True 
 B)False

Question 14

A market share of 78.5 percent would be represented in a pie chart by a slice with a central angle of:

Accepted Answer

A)  78.5 degrees 
B)  39.3 degrees 
C)  282.6 degrees 
D)  141.3 degrees 
E)  157 degrees 
A)  78.5 degrees 
B)  39.3 degrees 
C)  282.6 degrees 
D)  141.3 degrees 
E)  157 degrees

Question 15

In the term "frequency distribution," frequency refers to the number of data values or measurements falling within each class.

Accepted Answer

A) True 
 B)False

Question 16

A hospital administration would like to know the average length that a patient stays in the hospital. It would be almost impossible to look through all of the past records and average the lengths of stay. Instead, a sample of 1000 patients over the last year was randomly chosen and their lengths of stay were averaged. Describe the population and sample in this problem.
Population: ________________________________________________________
Sample: ________________________________________________________

Accepted Answer

The lengths of stay of all the

Question 17

The class interval in a frequency distribution is the number of data values falling within each class.

Accepted Answer

A) True 
 B)False

Question 18

A common rule of thumb in constructing a relative frequency histogram is to use:

Accepted Answer

A)  less than 5 classes 
B)  more than 10 classes 
C)  between 5 and 12 classes 
D)  any number of classes 
E)  at least 10 classes 
A)  less than 5 classes 
B)  more than 10 classes 
C)  between 5 and 12 classes 
D)  any number of classes 
E)  at least 10 classes

Question 19

A high school volleyball coach has summarized the wins, losses, and ties of her team for the past 4 years in the following stacked bar chart. Interpret the chart.

Accepted Answer

The team's best year

Question 20

The two graphical techniques we usually use to present qualitative data are:

Accepted Answer

A)  bar chart and histogram 
B)  histogram and pie chart 
C)  bar chart and pie chart 
D)  line chart and stem and leaf plot 
E)  bar chart and line chart 
A)  bar chart and histogram 
B)  histogram and pie chart 
C)  bar chart and pie chart 
D)  line chart and stem and leaf plot 
E)  bar chart and line chart

The total area of the six bars in a relative frequency histogram for which the width of each bar is five units is 5.

If the manager of a grocery store wishes to display the sales trend, the most effective type of graph will be:

The four classes: p to < 5, 5 to < 10, 10 to < 20, over 20, would be acceptable for developing a frequency distribution.

Descriptive statistics deals with methods of:

Which of the following is not the goal of descriptive statistics?

When constructing a relative frequency distribution, if the data are discrete, it will always be necessary to develop class boundaries.

Statistical inference is the process of making an estimate, prediction, or decision about a population based on sample data.

A histogram is usually used to display which of the following characteristics for a quantitative variable?

A continuous quantitative variable is one that can assume values at all points on an interval of values, with no gaps between possible values.

You asked ten of your classmates about their weight. On the basis of this information, you stated that the average weight of all students in your university or college is 158 pounds. This is an example of:

Groupings of data, created to enhance an understanding of them, usually by making the groups collectively exhaustive and mutually exclusive are called classes or categories.

A relative frequency distribution describes the proportion of data values that fall within each category.

A market share of 78.5 percent would be represented in a pie chart by a slice with a central angle of:

In the term "frequency distribution," frequency refers to the number of data values or measurements falling within each class.

The class interval in a frequency distribution is the number of data values falling within each class.

A common rule of thumb in constructing a relative frequency histogram is to use:

A high school volleyball coach has summarized the wins, losses, and ties of her team for the past 4 years in the following stacked bar chart. Interpret the chart.

The two graphical techniques we usually use to present qualitative data are:

Describing Data With Numerical Measures

Describing Bivariate Data

Probability and Probability Distributions

Several Useful Discrete Distributions

The Normal Probability Distribution

Sampling Distributions

Large-Sample Estimation

Large-Sample Tests of Hypotheses

Inference From Small Samples

The Analysis of Variance

Linear Regression and Correlation

Multiple Regression Analysis

Analysis of Categorical Data

Nonparametric Statistics

Filters

Exam 1: Describing Data With Graphs

The total area of the six bars in a relative frequency histogram for which the width of each bar is five units is 5.

If the manager of a grocery store wishes to display the sales trend, the most effective type of graph will be:

The four classes: p to < 5, 5 to < 10, 10 to < 20, over 20, would be acceptable for developing a frequency distribution.

Descriptive statistics deals with methods of:

Which of the following is not the goal of descriptive statistics?

When constructing a relative frequency distribution, if the data are discrete, it will always be necessary to develop class boundaries.

Statistical inference is the process of making an estimate, prediction, or decision about a population based on sample data.

A histogram is usually used to display which of the following characteristics for a quantitative variable?

A continuous quantitative variable is one that can assume values at all points on an interval of values, with no gaps between possible values.

You asked ten of your classmates about their weight. On the basis of this information, you stated that the average weight of all students in your university or college is 158 pounds. This is an example of:

Groupings of data, created to enhance an understanding of them, usually by making the groups collectively exhaustive and mutually exclusive are called classes or categories.

A relative frequency distribution describes the proportion of data values that fall within each category.

A market share of 78.5 percent would be represented in a pie chart by a slice with a central angle of:

In the term "frequency distribution," frequency refers to the number of data values or measurements falling within each class.

The class interval in a frequency distribution is the number of data values falling within each class.

A common rule of thumb in constructing a relative frequency histogram is to use:

A high school volleyball coach has summarized the wins, losses, and ties of her team for the past 4 years in the following stacked bar chart. Interpret the chart.

The two graphical techniques we usually use to present qualitative data are:

Describing Data With Numerical Measures

Describing Bivariate Data

Probability and Probability Distributions

Several Useful Discrete Distributions

The Normal Probability Distribution

Sampling Distributions

Large-Sample Estimation

Large-Sample Tests of Hypotheses

Inference From Small Samples

The Analysis of Variance

Linear Regression and Correlation

Multiple Regression Analysis

Analysis of Categorical Data

Nonparametric Statistics

Filters