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January 28, 2015

January 28, 2015

Posted by **Adam** on Friday, March 19, 2010 at 7:15am.

Ho: population mean=200

H1: population mean<200

sample mean=190

n=9

population standard deviation=50

Calculate the p-value of the test

- statistics -
**MathGuru**, Friday, March 19, 2010 at 9:27amUse 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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