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 frequency bar chart of this data.Which car dealer came in last place in terms of overall service?

Whether or not you are over the age of 21 is a nominal variable.

For which type of data are the values arbitrary numbers?

If two nominal variables are unrelated, then the patterns exhibited in their corresponding bar charts should be approximately the same.If some relationship exists, then some bar charts will differ from others.

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 to summarize this data.Which major was the most popular?

All calculations are permitted on interval data.

A pie chart shows the ____________________ of individuals that fall into each category.

A cross-classification table is used to describe the relationship between two ____________________ variables.

Car buyers were asked to indicate the car dealer they believed 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: What percentage of car buyers identified Contour Motors as having the best overall service?

Two types of graphs that organize nominal data are ____________________ and ____________________.

All-Nighters A sample of 400 students at a certain university was taken after the midterm; 200 students reported staying up all night before the midterm and the other 200 students did not.Researchers recorded whether each student did well or poorly on the midterm.The following table contains the results. Did Well on Did Poorly on Midterm Midterm Stayed up all night 60 140 Did not stay up all night 120 80 -{All-Nighter Narrative} Of those who stayed up all night before the midterm, what percentage did well on the midterm?

Data that contains information on two variables is called ____________________ data.

Which of the following techniques can be used to explore relationships between two nominal variables?