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Math Help - please help in finding a p-vlaue and critical value!

  1. #1
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    please help in finding a p-vlaue and critical value!

    Assume that a simple random sample has been selected from a normally distributed population. Find the p-value, critical value(s), and state the final conclusion.
    Test the claim that the mean age of a prison population in one city is less than 26 years. Sample data are summarized as n=25, x bar= 24.4 years, and s=9.2 years. Use significance level of 0.05

    Find the p-value and the critical value(s)

    test statistic: -0.8696
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  2. #2
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    Quote Originally Posted by tennisair View Post
    Assume that a simple random sample has been selected from a normally distributed population. Find the p-value, critical value(s), and state the final conclusion. Mr F says: This makes no sense and is clearly lacking essential information.

    Test the claim that the mean age of a prison population in one city is less than 26 years. Sample data are summarized as n=25, x bar= 24.4 years, and s=9.2 years. Use significance level of 0.05
    Find the p-value and the critical value(s)

    test statistic: -0.8696 Mr F says: How have you calculated this value? I get a different one.
    Where are you stuck here? What have you tried? Have you thought about what H0 and H1 are? Do you know what distribution must be used?

    You have to throw us a bone, not just post the question.
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  3. #3
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    Quote Originally Posted by tennisair View Post
    Assume that a simple random sample has been selected from a normally distributed population. Find the p-value, critical value(s), and state the final conclusion.
    Test the claim that the mean age of a prison population in one city is less than 26 years. Sample data are summarized as n=25, x bar= 24.4 years, and s=9.2 years. Use significance level of 0.05
    Find the p-value and the critical value(s)

    test statistic: -0.8696
    In fact, I now see that this is identical to the questions posted here: http://www.mathhelpforum.com/math-he...c-p-value.html

    (except ice skater is replaced with prison population - amazingly, Google has shown that having 25 prisoner ice skaters is possible ..... I can Harding believe it ....).
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