A survey claims that 9 out of 10 doctors recommend aspirin for their patients with headaches. To test this claim, a random sample of 100 doctors results in 83 who indicate that they recommend aspirin. Which of the following tests will you perform?
A) t test for mean
B) pooled-variance t test
C) Z test for proportion
D) separate-variance t test

Question

Quizplus · Accepted Answer

The given scenario involves a categorical variable (recommend or not recommend aspirin) with a sample proportion (83/100 = 0.83). To test the claim, we need to perform a hypothesis test for proportion. The Z-test for proportion is appropriate as the sample size (n=100) is large and we can assume that the sampling distribution is approximately normal.

A Survey Claims That 9 Out of 10 Doctors Recommend