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A fast - food chain wishes to determine whether there are any differences in three media (magazine, TV, radio) in terms of consumer recall of an ad. The results of an advertising study are as follows:
Media
Recall Ability Magazine TV Radio Total
Number of persons
remembering ad 25 10 7 42
Number of persons not remembering ad 73 93 108 274
Total 98 103 115 316
a. At the 0.05 level of significance, determine whether there is evidence of a significant media effect with respect to the proportion of individuals who can recall the ad.
b. If appropriate, use the .05 level of significance and determine which media are different in recall ability of the ad.
Please only answer (b.), I have already answered (a.)
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