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Exam 2: Descriptive Statistics: Tabular and Graphical Displays

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Question 31

Multiple Choice

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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

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

E) B) and C)
F) B) and D)

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Question 32

Multiple Choice

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

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

E) None of the above
F) A) and D)

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Question 33

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

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

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

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

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

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

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

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

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

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

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

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

The percent frequency of a class is computed by

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

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?

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.