Exam 2: Graphical Descriptive Techniques I

Car Buyers Forty car buyers were asked to indicate which car dealer offered the best overall service.The four choices were Contour Motors (C), Modern Chrysler (M), Tonneau Auto (T), and Uncanny Chevrolet (U).The following data were obtained: -{Car Buyers Narrative} Construct a pie chart of this data.Which car dealer offered the best overall service?

Suppose you measure the number of minutes it takes an employee to complete a task, where the maximum allowed time is 5 minutes, and each time is rounded to the nearest minute.Data from 130 employees is summarized below.How long did it take most employees to complete the task?

Business School Graduates A sample of business school graduates were asked what their major was.The results are shown in the following frequency distribution. -{Business School Graduates Narrative} Draw a pie chart of this data.Are you able to reconstruct the original data from this pie chart alone?

For what type of data are frequencies the only calculations that can be done?

Bar and pie charts are graphical techniques for nominal data.The former focus the attention on the frequency of the occurrences of each category, and the later emphasizes the proportion of occurrences of each category.

To describe the relationship between two nominal variables you make a scatter diagram and look for a correlation.

Suppose you measure the number of minutes it takes an employee to complete a task, where the maximum allowed time is 5 minutes, and each time is rounded to the nearest minute.Data from 130 employees is summarized below.Construct a frequency bar chart and a pie chart from this data.How long did it take most employees to complete the task?

Your age group (1-9; 10-19; 20-29; 30-39; etc.) is an interval variable.

A(n) ____________________ chart is not able to show frequencies.It can only show relative frequencies.

You cannot calculate and interpret differences between numbers assigned to ordinal data.

In the following cross-classification table, gender and car ownership are related.

Give an example of interval data that can also be treated as ordinal data and nominal data.

A variable is some characteristic of a population or sample.

Values must represent ordered rankings for what type of data?

A cross-classification table summarizes data from two nominal variables.

Explain why religious preference is not an ordinal variable.

The classification of student major (accounting, economics, management, marketing, other) is an example of a(n)

Two hundred males and two hundred females were asked whether or not college baseball should have a playoff system (yes/no/undecided).Pie charts of the responses for males vs.females are shown below.Which of the following describes the relationship between gender and opinion?

The bar charts below summarize data collected on 100 adults regarding gender and pet ownership.Which of the following statements is (are) true based on this chart?

If two pie charts made from the rows of a cross-classification table look the same, then the two nominal variables ____________________ (are/are not) related.