The ages (in years) of 1098 people stopped (on foot or in a vehicle) by police in New York City on December 1, 2012, are described by the dotplot in Fig. 57 and the stemplot in Fig. 58, although the right part of the stemplot has been cut off (truncated).
Figure 57

Figure 58
Decimal point is 1 digit(s) to the right of the colon.

a. In order to save vertical space, each dot in the dotplot may represent up to 21 ages. On the basis of the dotplot alone, estimate the outliers.
b. To the right of €œHigh,€ the truncated stemplot identifies the outliers. Compare the outliers and their frequencies with your result in part (a).
c. Which data are ridiculous or questionable in this situation? Explain. What type of bias in sampling occurred?
d. Here are some actions that might be taken on each of the outliers, questionable data, and ridiculous data:
€¢ Remove the data value.
€¢ Review the original report completed by the police officer and check the age recorded.
€¢ Interview the police officer who completed the report about the age of the suspect.
Which actions would you recommend be taken, and in which order should they be done so that the researcher€™s and police officers€™ time is not wasted?

Transcribed Image Text:

Stopped by Police Up to 21 values per dot 0 50 100 150 200 250 300 350 400 Years 0 1113 09 13333 3344444 444444 4444444444 1 555555555555555555555555555555555555555 2 000000000000000000000000000000000000000 2 55555555555555555555555555555555555 666 6 3: 000000000000000000000111 111111111111 111 3 55555555555555556666 6666 666667777777777 4: 000000000000011122222222333 3333 344 4 444 4 4 555555555555556 666 667777777777888888888 5 : 001111 5 : 55555556666667778999 6: 0000011222223 6: 59 111222222222344444