Question 1

After developing a frequency distribution for a quantitative variable,a histogram can be developed with the horizontal axis representing the values of the variable and the vertical axis representing the frequency of occurrence in each class or group.

Accepted Answer

A) True 
 B)False

Question 2

There is no hard-and-fast rule regarding the number of classes that must be used when establishing a frequency distribution for a continuous variable.

Accepted Answer

A) True 
 B)False

Question 3

Consider a situation in which both a frequency distribution and a relative frequency distribution have been developed for the same quantitative variable.If histograms are constructed from each distribution,the graphs will appear to have the same shape.

Accepted Answer

A) True 
 B)False

Question 4

In constructing a stem and leaf diagram,there is a hard-and-fast rule for defining the stem and the leaves.

Accepted Answer

A) True 
 B)False

Question 5

Once you have determined the class width using the formula,high-low divided by the number of classes,it is appropriate to round to the nearest integer to make the analysis easier.

Accepted Answer

A) True 
 B)False

Question 6

An ogive is a graph of a joint frequency distribution.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following CANNOT be shown effectively with a histogram?

Accepted Answer

A) A frequency distribution 
B) A joint frequency distribution 
C) A relative frequency distribution 
D) The center,shape and spread of a distribution

Question 8

The difference between bar charts and histograms is that bar charts always show percentage while histograms always show frequency.

Accepted Answer

A) True 
 B)False

Question 9

One of the advantages that a stem and leaf diagram has over a histogram is:

Accepted Answer

A) the detail of the data is preserved. 
B) it shows the general distribution of a quantitative variable. 
C) it can be used with nominal data. 
D) There are no advantages.

Question 10

On a scatter diagram,the independent variable should be placed on the horizontal axis and the dependent variable should be placed on the vertical axis.

Accepted Answer

A) True 
 B)False

Question 11

Sawyer & Company is a law firm in Dallas,Texas.Recently,the administrative manager prepared a report for the managing partners that showed the number of court cases handled by the firm monthly over the past three years.One of the objectives of graphing these data might have been to identify a trend in the number of court cases.

Accepted Answer

A) True 
 B)False

Question 12

When using Excel's Histogram option under the Data Analysis tool,the term bins refers to:

Accepted Answer

A) the mid-point of each class. 
B) the column where the data are located. 
C) the upper limits of each class. 
D) the lower limits of each class.

Question 13

A stem and leaf diagram is used to:

Accepted Answer

A) display the distribution of a quantitative variable. 
B) show the joint relationship between two variables. 
C) graph a joint frequency distribution. 
D) show relative cumulative frequency.

Question 14

A histogram can be constructed for data that are either quantitative or qualitative.

Accepted Answer

A) True 
 B)False

Question 15

A study of 4000 Dell PC customers listed the age of the customer among other variables.The youngest customer was 14 years old and the oldest customer was 84 years old.If analysts for the company wish to develop a frequency distribution with 7 classes,the smallest value that the class width can be is 10 years.

Accepted Answer

A) True 
 B)False

Question 16

A company has 400 employees.The manager of human resources has recorded the annual salary and wages for each employee.These value range from $17,500 to $67,800.Provide an example of a stem and a leaf that could be developed to describe the distribution of the salary and wage data.

Accepted Answer

The answer of A company has 400 employees.The manager of...

Question 17

When choosing class boundaries for a frequency distribution,classes such as 60-70,70-80,80-90 would be acceptable.

Accepted Answer

A) True 
 B)False

Question 18

A recent study of students at the university contained data on year in school and student age.An appropriate tool for analyzing the relationship between these two variables would be a joint frequency distribution.

Accepted Answer

A) True 
 B)False

Question 19

When a histogram is constructed for discrete numerical data,there should be spaces between the bars of the histogram.

Accepted Answer

A) True 
 B)False

Exam 2: Graphs,Charts and Tablesdescribing Your Data

After developing a frequency distribution for a quantitative variable,a histogram can be developed with the horizontal axis representing the values of the variable and the vertical axis representing the frequency of occurrence in each class or group.

There is no hard-and-fast rule regarding the number of classes that must be used when establishing a frequency distribution for a continuous variable.

Consider a situation in which both a frequency distribution and a relative frequency distribution have been developed for the same quantitative variable.If histograms are constructed from each distribution,the graphs will appear to have the same shape.

In constructing a stem and leaf diagram,there is a hard-and-fast rule for defining the stem and the leaves.

Once you have determined the class width using the formula,high-low divided by the number of classes,it is appropriate to round to the nearest integer to make the analysis easier.

An ogive is a graph of a joint frequency distribution.

Which of the following CANNOT be shown effectively with a histogram?

The difference between bar charts and histograms is that bar charts always show percentage while histograms always show frequency.

One of the advantages that a stem and leaf diagram has over a histogram is:

On a scatter diagram,the independent variable should be placed on the horizontal axis and the dependent variable should be placed on the vertical axis.

When using Excel's Histogram option under the Data Analysis tool,the term bins refers to:

A stem and leaf diagram is used to:

A histogram can be constructed for data that are either quantitative or qualitative.

A company has 400 employees.The manager of human resources has recorded the annual salary and wages for each employee.These value range from $17,500 to $67,800.Provide an example of a stem and a leaf that could be developed to describe the distribution of the salary and wage data.

When choosing class boundaries for a frequency distribution,classes such as 60-70,70-80,80-90 would be acceptable.

A recent study of students at the university contained data on year in school and student age.An appropriate tool for analyzing the relationship between these two variables would be a joint frequency distribution.

When a histogram is constructed for discrete numerical data,there should be spaces between the bars of the histogram.