n1=12, s21=0.439, n2=19, s22=1.638, Ha: σ21<σ22, α=0.05
Step 1 of 2: Determine the critical value(s) of the test statistic. If the test is two-tailed, separate the values with a comma. Round your answer(s) to four decimal places.
Step 2 of 2:
Make a decision.
Reject Null Hypothesis or Fail to Reject Null Hypothesis
Hypothesis : VS
Since , the test is one tailed ( left ) test.
The test statistic is ,
The critical value is ,
; From excel "=FINV(0.95,11,18)"
Decision : Here , the value of the test statistic lies in the rejection region.
Therefore , Reject the null hypothesis.
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