Author Question: A researcher would like to test the claim that 9 out of 10 doctors prefer Brand X. A sample of 60 ... (Read 64 times)

bobthebuilder · **on:** Jun 20, 2018

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 c. 48
b. 12 d. 54

Question 2

In the observed frequencies for a chi-square test for independence, how often is each participant counted?

a. Just once
b. Once in each row
c. Once in each column
d. Once in each row and once in each column