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Math Help - P-Value and T

  1. #1
    Junior Member arcticreaver's Avatar
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    P-Value and T

    so again with another p-value problem. but this time, gotta solve for t as well.

    The sample mean and standard deviation from a random sample of 10 observations from a normal population were computed as x-bar = 23 and s = 9.

    Calculate the value of the test statistic (3 decimals) and the p-value (4 decimals) of the test required to determine whether there is enough evidence to infer at the 5% significance level that the population mean is greater than 20.

    t =

    p-value =

    so i get 1.054 for t which is correct:

    23-20 / 9 / sqrt 10 = 1.054

    now the p-value is where i have the problem...

    not even sure where to start.
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  2. #2
    MHF Contributor
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    Re: P-Value and T

    Hey arcticreaver.

    You need to either use a computer program or a set of statistical tables to get the p-value. In R the command should be pt(). Have you used t-tables before?
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