Information and IdeasHardChoosing the right rate comparison
Information and Ideas practice question
Two coffee shops last month:
Shop X: 3,000 customers, 90 complaints
Shop Y: 1,200 customers, 48 complaints
A reviewer claims that Shop X had fewer complaints per customer than Shop Y. Which choice most effectively uses data from the table to support the claim?
- A. Shop X had 3 complaints per 100 customers (90 ÷ 3,000), compared with 4 per 100 at Shop Y (48 ÷ 1,200).Correct
- B. Shop X had more customers than Shop Y.
- C. Shop X had more complaints than Shop Y.
- D. Shop Y had 48 complaints.
Answer: A. Shop X had 3 complaints per 100 customers (90 ÷ 3,000), compared with 4 per 100 at Shop Y (48 ÷ 1,200).
Per customer requires dividing complaints by customers for both shops.
Why the other answers are wrong
- B. Shop X had more customers than Shop Y.
- Customer numbers alone say nothing about complaints per customer.
- C. Shop X had more complaints than Shop Y.
- Raw complaints point the wrong way and ignore volume.
- D. Shop Y had 48 complaints.
- One count, no rate.
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