Information and IdeasHardChoosing data that support a claim about proportion
Information and Ideas practice question
A survey asked commuters at two stations whether their train was on time that morning.
Station | Commuters asked | On time
North | 200 | 150
South | 80 | 68
A passenger group argues that South station's service is the more punctual, even though ____
Which choice most effectively uses data from the table to complete the statement?
- A. more North commuters reported an on-time train, 150 to 68, since South's 68 is 85% of those asked against North's 75%.Correct
- B. South station had 80 commuters asked.
- C. North station had 200 commuters asked.
- D. 68 South commuters were on time.
Answer: A. more North commuters reported an on-time train, 150 to 68, since South's 68 is 85% of those asked against North's 75%.
150/200 = 75%; 68/80 = 85%.
Why the other answers are wrong
- B. South station had 80 commuters asked.
- Sample size alone.
- C. North station had 200 commuters asked.
- Sample size alone.
- D. 68 South commuters were on time.
- A count, not the comparison.
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