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Math Help - Help me please =( test statistic, p value, critical values conclusion

  1. #1
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    Help me please =( test statistic, p value, critical values conclusion

    test the claim that the mean age of the prison population in one city is less than 26 years. Sample data are summarized as:
    n=25
    x=24.4 years
    s= 9.2 years

    Use a significance level of a=0.05.

    Assume that a simple random sample has been selected from a normally distributes population. Find the test statistic, p value, critical value(s) and state the final conclusion.
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  2. #2
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    Re: Help me please =( test statistic, p value, critical values conclusion

    Assuming this is the sample mean

    Quote Originally Posted by numbaoneazn1 View Post
    x=24.4 years
    Let's do these one at a time.

    Test statistic is T_{calc} = \frac{\bar{x}- \mu_0}{\frac{s}{\sqrt{n}}} , what do you get?
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    Re: Help me please =( test statistic, p value, critical values conclusion

    I'm not sure?
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    Re: Help me please =( test statistic, p value, critical values conclusion

    \bar{x} = 24.4 ,   \mu_0 = 26, s = 9.2,  n=25


    now find T_{calc} = \frac{\bar{x}- \mu_0}{\frac{s}{\sqrt{n}}}
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  5. #5
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    Re: Help me please =( test statistic, p value, critical values conclusion

    24.4-26= -1.6? is this right? at least for the numerator
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    Re: Help me please =( test statistic, p value, critical values conclusion

    Yep, good start!
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