16Hit1600
Expression of IdeasEasy–MediumReporting a comparison

Expression of Ideas practice question

While researching a topic, a student has taken the following notes: - A school compared two ways of teaching pupils to swim. - Group A had two 30-minute lessons a week; Group B had one 60-minute lesson. - After a term, 80% of Group A could swim 25 metres. - After a term, 55% of Group B could.

The student wants to compare the results of the two approaches. Which choice most effectively uses relevant information from the notes to accomplish this goal?

  1. A. After a term, 80% of pupils who had two 30-minute lessons a week could swim 25 metres, compared with 55% of those who had one 60-minute lesson.Correct
  2. B. The school compared two ways of teaching swimming.
  3. C. Group B had one 60-minute lesson a week.
  4. D. After a term, 80% of Group A could swim 25 metres.

Answer: A. After a term, 80% of pupils who had two 30-minute lessons a week could swim 25 metres, compared with 55% of those who had one 60-minute lesson.

Both approaches and both results.

Why the other answers are wrong

B. The school compared two ways of teaching swimming.
Setup, no result.
C. Group B had one 60-minute lesson a week.
One approach, no result.
D. After a term, 80% of Group A could swim 25 metres.
One figure can't compare.

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