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Chapter 2: Q. 5 (page 88)
Identify two main types of graphical displays that are used for qualitative data.
Bar charts and pie charts are the two most used types of graphical displays for qualitative data.
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RBI Kings, As reported on MLB.com, the five players with the highest runs batted in (RBI) during the 2012 Major League Baseball season are listed in the following table. Also included are the teams for which they played, their positions, and their weights. Identify the type of data provided by the information in each column of the table.
In the special report "Mousetrap: The Most-Visited Shoe and Apparel E-tailers" (Footwear News, Vol. 58 , No. 3, p. 18), we found the following data on the average time, in minutes, spent per user per month from January to June of one year for a sample of shoe and apparel retail websites.
The following Minitab output shows a stem-and-leaf diagram for these data. The second column gives the stems, and the third column gives the leaves.
Women in the Workforce. In an issue of Science (Vol. 308, No. 5721 , p. 483), D. Normile reported on a study from the Japan Statistics Bureau of theindustrialized countries in the Organization for Economic Co-operation and Development (OECD) titled "Japan Mulls Workforce Goals for Women." Following are the percentages of women in scientific workforces for a sample of countries. Construct a stem-and-leaf diagram for these percentages.
Stressed-Out Bus Drivers. Frustrated passengers, congested streets, time schedules, and air and noise pollution are just some of the physical and social pressures that lead many urban bus drivers to retire prematurely with disabilities such as coronary heart disease and stomach disorders. An intervention program designed by the Stockholm Transit District was implemented to improve the work conditions of the city's bus drivers. Improvements were evaluated by G. Evans et al., who collected physiological and psychological data for bus drivers who drove on the improved routes (intervention) and for drivers who were assigned the normal routes (control). Their findings were published in the article "Hassles on the Job: A Study of a Job Intervention With Urban Bus Drivers" (Journal of Organizational Behavior, ). Following are data, based on the results of the study, for the heart rates, in beats per minute, of the intervention and control drivers.
When is the use of single-value grouping particularly appropriate?
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