Management science department have conducted an IQ test to evaluate the level of students. The department divide the students in two independent groups. The results of both groups are as follow. Formulate a hypothesis to test the difference between two groups at α=0.01. Group I: 129, 132, 115, 110, 117, 121, 112, 120, 116.
Group II: 135, 141, 138, 140, 139, 142, 137, 134, 136.
First you are suppose to perform the test for equality of variances.