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Math Help - Independent random samples..

  1. #1
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    Question Independent random samples..

    Independent random samples from two normal populations produced the variance listed here:
    Sample size-1: 16 Sample variance: 55.7
    Sample size-2: 20 Sample variance: 31.4

    a) Do the data provide sufficient evidence to indicate that σ12 differs from σ22 . test using alpha=0.05.

    b) Find the approximate p-value for the test and interpret its value.
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  2. #2
    MHF Contributor matheagle's Avatar
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    Quote Originally Posted by mathcalculushelp View Post
    Independent random samples from two normal populations produced the variance listed here:
    Sample size-1: 16 Sample variance: 55.7
    Sample size-2: 20 Sample variance: 31.4

    a) Do the data provide sufficient evidence to indicate that σ12 differs from σ22 . test using alpha=0.05.

    b) Find the approximate p-value for the test and interpret its value.

    Take the ratio of the two sample variances and use an F with 15,19 degrees of freedom.
    There are online links for stat calculators that will help you obtain the p-value.
    Last edited by matheagle; November 23rd 2009 at 11:20 PM.
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    Question

    What does F mean ?
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  4. #4
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    Quote Originally Posted by mathcalculushelp View Post
    What does F mean ?
    You're expected to know this: F-test - Wikipedia, the free encyclopedia
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