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A Summary of Variance
Comparison Test Procedures

Using the equations on the previous pages we have established all the statistical data we need to conduct the hypothesis test. One question remains: What is our Hypothesis ? Because we have established that s²₁ > s²₂, we have a choice between two possible hypotheses:

or
The latter of the two, ²₁ ²₂ , naturally implies a right-tailed hypothesis test. There are no left-tailed tests. The former, ²₁= ²₂ is the more common test and requires a two-tailed test. How do we find the significance level ?

Procedure used to determine significance level
Case Example: Pain Medication and Response Time

5:6

A Summary of Variance
Comparison Test Procedures

Using the equations on the previous pages we have established all the statistical data we need to conduct the hypothesis test. One question remains: What is our Hypothesis ? Because we have established that s²₁ > s²₂, we have a choice between two possible hypotheses:

The latter of the two, ²₁ ²₂ , naturally implies a right-tailed hypothesis test. There are no left-tailed tests. The former, ²₁= ²₂ is the more common test and requires a two-tailed test. How do we find the significance level ?

A Summary of Variance Comparison Test Procedures

Using the equations on the previous pages we have established all the statistical data we need to conduct the hypothesis test. One question remains: What is our Hypothesis ? Because we have established that s21 > s22, we have a choice between two possible hypotheses:

The latter of the two, 21 22 , naturally implies a right-tailed hypothesis test. There are no left-tailed tests. The former, 21 = 22 is the more common test and requires a two-tailed test. How do we find the significance level ?

A Summary of Variance
Comparison Test Procedures

Using the equations on the previous pages we have established all the statistical data we need to conduct the hypothesis test. One question remains: What is our Hypothesis ? Because we have established that s²₁ > s²₂, we have a choice between two possible hypotheses:

The latter of the two, ²₁ ²₂ , naturally implies a right-tailed hypothesis test. There are no left-tailed tests. The former, ²₁= ²₂ is the more common test and requires a two-tailed test. How do we find the significance level ?