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Here's some sample program output:
F test for equal standard deviations ____________________________________ Sample 1: Number of Observations = 240 Sample Standard Deviation = 65.549 Sample 2: Number of Observations = 240 Sample Standard Deviation = 61.854 Test Statistic = 1.123 CDF of test statistic: = 8.148e-001 Upper Critical Value at alpha: = 1.238e+000 Upper Critical Value at alpha/2: = 1.289e+000 Lower Critical Value at alpha: = 8.080e-001 Lower Critical Value at alpha/2: = 7.756e-001 Results for Alternative Hypothesis and alpha = 0.0500 Alternative Hypothesis Conclusion Standard deviations are unequal (two sided test) REJECTED Standard deviation 1 is less than standard deviation 2 REJECTED Standard deviation 1 is greater than standard deviation 2 REJECTED
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