This part of your post makes no sense: "...by performing several test and the test is abnormal..."
The word "several" indicates a plural, and yet your references after that are singular ("test" twice). It makes a difference.
Also -- you need to indicate the SUBJECT not the abbreviation for your course. Is this math? statistics? psychology? what??
If we compare the common variance by performing several test and the test is abnormal would we reject the hypothesis.
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