A researcher would like to investigate whether or not there is a difference in IQ between Psychology and History majors. She gathers 16 students (8 whose major is Psychology, and 8 whose major is history) and has them all take an IQ test to test this hypothesis using an alpha level of .01. Below are the data:

Psych: 120, 114, 100, 121, 124, 102, 110, 123

history: 95, 92, 145, 101, 100, 98, 97, 120

What is the appropriate test?

What is the null hypothesis?

What is the alternative hypothesis?

What is (are) the critical value(s)?

Calculate the obtained statistic?

Make a Decision:

Reject Null

Retain Null

What does your decision mean?