A researcher would like to test the claim that 9 out of 10 doctors prefer Brand X.A sample of 60 doctors is obtained and each is asked to compare Brand X with another leading brand.The data show that 48 of the doctors picked Brand X.If these data are evaluated using a chi-square test for goodness of fit,what is the expected frequency for Brand X?
A)6
B)12
C)48
D)54

Question

Quizplus · Accepted Answer

The expected frequency for Brand X is calculated based on the claim that 9 out of 10 doctors prefer Brand X. Therefore, for a sample of 60 doctors, the expected number would be 9/10 of 60, which equals 54.

A Researcher Would Like to Test the Claim That 9