To attract business, a clothing store mails discount coupons to residents of a town. To estimate the proportion of the store’s shoppers who are using the coupons, the store manager selects a random sample of 100 customers who visit the store on a weekend. The manager finds that 38 of them are using the coupons mailed to their homes. Which of the following describes the sample in this setting?
Answer
A
all residents of the town
B
the 38 shoppers who used coupons
C
the 100 randomly selected shoppers
D
all shoppers in the store on the weekend
Explanation
The sample is the group actually selected and observed to estimate the proportion of coupon users. Here, the manager randomly selected 100 shoppers who visited on a weekend, so the sample is the 100 randomly selected shoppers. The 38 coupon users are only the subset who had the characteristic being measured.
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