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Information and IdeasVery hardReading a table from a drug trial

Information and Ideas practice question

Recovery within one week Group | Patients | Recovered Drug | 200 | 30 Placebo | 200 | 28 A reviewer argues that the trial does not show the drug speeds recovery, because ____

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

  1. A. the difference of two patients between the groups is too small to rule out chance.Correct
  2. B. only 30 patients in the drug group recovered.
  3. C. the placebo group had 200 patients.
  4. D. 28 patients recovered without the drug.

Answer: A. the difference of two patients between the groups is too small to rule out chance.

Two patients out of two hundred.

Why the other answers are wrong

B. only 30 patients in the drug group recovered.
A count, no comparison.
C. the placebo group had 200 patients.
Size alone.
D. 28 patients recovered without the drug.
A count, no comparison.

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