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Chapter 2: Q. 6 (page 88)
In a bar chart, unlike in a histogram, the bars do not abut. Give a possible reason for that.
The bars in a bar chart may not abut, distinguishing between a bar chart and a histogram can be challenging.
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Detroit Tigers. From the Baseball Almanac website, we found the heights, in inches, of the players on the 2012 World Series runner-up Detroit Tigers baseball team.
Use the graph to answer the following questions. Note that cholesterol levels are always expressed as whole numbers.
a. Construct a stem-and-leaf diagram of these data with five lines per stem.
b. Why is it better to use five lines per stem here instead of one or two lines per stem?
Process Capability. R. Morris and E. Watson studied various aspects of process capability in the paper "Determining Process Capability in a Chemical Batch Process" (Quality Engineering, Vol. , pp. 389-396). In one part of the study, the researchers compared the variability in product of a particular piece of equipment to a known analytic capability to decide whether product consistency could be improved. The following data were obtained for 10 batches of product.
Construct a stem-and-leaf diagram for these data with
a. one line per stem.
b. two lines per stem.
c. Which stem-and-leaf diagram do you find more useful? Why?
Recording Industry Statistics. The Recording Industry Association of America (RIAA) reports annual statistics on shipments and revenues. For the year 2012, RIAA reported the following data on physical shipments. [SOURCE: Year.End industry Shipment and Revenue Statistics. Published by RIAA, (c) 2012.]
Identify the type of data provided by the information in each of the following columns of the table:
a. first b. second c. third
When is the use of single-value grouping particularly appropriate?
Drug dealer motivation is traditionally attributed to greed or social pressures. Researchers R. Highland and D. Dabney explore possible personality characteristics as a motivation in the article "Using Adlerian Theory to Shed Light on Drug Dealer Motivations" (Applied Psychology in Criminal Justice, Vol. 5, Issue 2, pp. 109-138). The following table lists the types of drug sold from a sample of convicted drug dealers.
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