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A statistics practitioner formulated the following hypothesis:

Ho: population mean=200
H1: population mean<200

sample mean=190
population standard deviation=50

Calculate the p-value of the test

  • statistics - ,

    Use the z-test formula to find the test statistic since you know the population standard deviation:
    z = (sample mean - population mean)/(standard deviation divided by the square root of the sample size)

    With the data given in the problem:
    z = (190 - 200)/(50/√9)

    Finish the calculation and determine the p-value using a z-table. The p-value is the actual level of the test statistic.

    I hope this will help get you started.

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