Chapter 2.1, Problem 20P

For Problems 15-20. use the specified number of classes to do the following.

(a) Find the class width.

(b) Make a frequency table showing class limits, class boundaries. midpoints, frequencies, relative frequencies, and cumulative frequencies.

(C) Draw a histogram.

(d) Draw a relative-frequency histogram.

(e) Categorize the basic distribution shape as uniform, mound-shaped symmetric, bimodal. skewed left, or slewed right.

(f) Draw an ogive.

(g) Interpretation Discuss some of the features about the data that the graphs reveal. Consider items such as data range, location of the middle half of the data, unusual values, outliers, etc.

Advertising: Readability “Readability Levels of Magazine Ads,” by F.K. shuptrine and D.D. McVicker, is an article in the Journal of Advertising Research. (For more information. Find the web site for DASL, the Carnegie Mellon University Data and Story Library. Look in Data Subjects under consumer and then Magazine Ads Readability file.) The following is a list of the number of three-syllable (or longer) words in advertising copy of randomly selected magazine advertisements.

34	21	37	31	10	24	39	10	17	18	32
17	3	10	6	5	6	6	13	22	25	3
5	2	9	3	0	4	29	26	5	5	24
15	3	8	16	9	10	3	12	10	10	10
11	12	13	1	9	43	13	14	32	24	15