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Advertisers need to know which age groups are likely to see their ads. Purchasers of 120 copies of Cosmopolitan are shown by age group, (a) Make a bar chart and describe it. (b) Calculate expected frequencies for each class.
Cosmo:
Purchaser Age
Units Sold
18-24
38
25-34
28
35-44
19
45-54
16
55-64
10
65+
9
Total
120
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