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January 30, 2015

January 30, 2015

Posted by **John** on Monday, August 18, 2008 at 11:40am.

Thanks

- statistics -
**MathGuru**, Monday, August 18, 2008 at 10:08pmYou may want to check this with a statistics text, but here is one way you might approach this problem.

This looks like a hypothesis test involving two variances (standard deviation is the square root of the variance). The null hypothesis would be the ratio of the two variances less than or equal to 1. The alternative or alternate hypothesis would be the ratio of the two variances greater than 1.

Test statistic = 22^2/12^2 = ?

Finish the calculation. Using an F-distribution table at .05 level of significance, determine the critical or cutoff value to reject the null. (You will need to use degrees of freedom to determine the value.) If the test statistic exceeds the critical value from the table, the null is rejected in favor of the alternative hypothesis. If the test statistic does not exceed the critical value from the table, then the null is not rejected.

- statistics -
**John**, Wednesday, August 20, 2008 at 6:22pmThank you.

- statistics -

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