Hypothesis Testing of Variances - F test
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Problem:
5-Dec
Alaska American America West British Continental
7.74% 7.67% -0.89% -2.52% 4.12%
Delta JetBlue Northwest Southwest US Airways
4.45% 3.14% 4.84% 3.53% No Change
Estimate the variance of the percent change in airline stock
6-Dec
Alaska American America West British Continental
5.71% 5.54% 0.90% 1.08% 1.98%
Delta JetBlue Northwest Southwest US Airways
3.80% 1.25% 2.50% 0.74% 3.70%
Estimate the variance of the percent change in airline stock
Test all the null hypothesis that the variance of the change on December 5 is equal to the
variance of the change in December 6 against the alternative hypothesis that the December 5 variance is
greater, using an F test. What economic conclusions might you draw from the test result.
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Solution Summary
Solution describes the steps for calculating variances of changes in different airlines stocks and then hypothesis testing is carried for differences in variances.
Solution Preview
Please see the attached file for tables and formulas.
Solution:
Null hypothesis: Variances of change on both days are same
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Education
- BEng (Hons) , Birla Institute of Technology and Science, India
- MSc (Hons) , Birla Institute of Technology and Science, India
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