In: Statistics and Probability
"Readability Levels of Magazine Ads," by F.K. Shuptrine and D.D. McVicker, is an article in the Journal of Advertising Research. 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 Use eight classes
. (a) Find the class width.
(b) Make a frequency table showing class limits, class boundaries, midpoints, frequencies, relative frequencies, and cumulative frequencies. (Round your relative frequencies to two decimal places.) Class Limits Class Boundaries Lower − Upper Lower − Upper Midpoint Frequency Relative Frequency Cumulative Frequency 0 − 5 − 6 − 11 − 12 − 17 − 18 − 23 − 24 − 29 − 30 − 35 − 36 − 41 − 42 − 47 −
(c) Draw a histogram. Maple Generated Plot Maple Generated Plot Maple Generated Plot Maple Generated Plot
(d) Draw a relative-frequency histogram. Maple Generated Plot Maple Generated Plot Maple Generated Plot Maple Generated Plot (e) Categorize the basic distribution shape. uniform skewed right bimodal skewed left mound-shaped symmetrical