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    Critical Values

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    Do one of the following as appropriate:
    a) Find the critical value t 
    b) Find the critical value z
    c) State that neither the normal nor the t distribution applies.
    Problem: 90%; n= 12;  is 24; population appears to be very skewed.

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    © BrainMass Inc. brainmass.com June 3, 2020, 5:19 pm ad1c9bdddf
    https://brainmass.com/statistics/quantative-analysis-of-data/critical-values-21727

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    Do one of the following as appropriate:
    <br>
    <br>a) Find the critical value t alpha/2
    <br>
    <br>just as in previous problem
    <br>df= 11 = 12-1 and critical t=1.796
    <br>
    <br>b) Find the critical value z alpha/2
    <br>
    <br>critical z=1.645.
    <br>
    <br>c) State that neither the normal nor the t distribution applies.
    <br>
    <br>//cf for previous problem 21722.Normal distribution does not apply since sample size is small.n=12. If the sample size is larger >30 then normal distribution can be used to approximate t distribution. This is the case for the previous problem.posting 21722.Normal distribution also does not apply even for large samples if data is significantly skewed.Then u have to use t distribution.You can determine this significance by doing a skewness test at:
    <br>http://www.wessa.net/skewkurt.wasp//
    <br>
    <br>answer here is neither of these applies because sample size is small ...

    Solution Summary

    Do one of the following as appropriate:
    a) Find the critical value t a/2
    b) Find the critical value z&#61537;&#61487;&#61490;
    c) State that neither the normal nor the t distribution applies.
    Problem: 90%; n= 12; &#61555; is 24; population appears to be very skewed.

    $2.19

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