posted by Adam on .
A statistics practitioner formulated the following hypothesis:
Ho: population mean=200
H1: population mean<200
population standard deviation=50
Calculate the p-value of the test
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.