16Hit1600
Information and IdeasVery hardChoosing data that match a claim about proportions

Information and Ideas practice question

A survey asked residents of three streets whether they would use a shared car club. Street | Residents asked | Would use Mill Street | 80 | 52 High Street | 120 | 54 Oak Lane | 40 | 30 The report notes that although the High Street had the most residents willing to use the club, the proportion was highest elsewhere: ____

Which choice most effectively uses data from the table to complete the statement?

  1. A. three quarters of Oak Lane's 40 residents said they would use it, against 45% on the High Street.Correct
  2. B. 54 High Street residents would use it.
  3. C. Mill Street had 80 residents asked.
  4. D. Oak Lane had the fewest residents willing to use it.

Answer: A. three quarters of Oak Lane's 40 residents said they would use it, against 45% on the High Street.

30/40 = 75%; 54/120 = 45%; Mill Street is 65%.

Why the other answers are wrong

B. 54 High Street residents would use it.
The largest count, which the claim already concedes.
C. Mill Street had 80 residents asked.
Sample size, not proportion.
D. Oak Lane had the fewest residents willing to use it.
True in count, but the claim is about proportion, where Oak Lane is highest.

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