A psychologist wants to test the hypothesis that college women will do better on a particular type of problemsolving task than will college men. He obtains the following results:

a. Test the null hypothesis that sex and success on the problem-solving task are independent. Does this mean the same as a statement about whether the percent success differs between males and females?

b. Calculate the phi coefficient for these data. Does it look like the psychologist is dealing with a small, medium, or large effect?

Transcribed Image Text:

Result on problem-solving task Sex Succeed Fail Male 12 18 Female 10 10