Consider the following hypothesis test:
H0: ? ? 50
Ha: ? > 50
A sample of 60 is used and the population standard deviation is 9. Use the critical value approach to state your conclusion for each of the following sample results. Use ? = .05.
a.With x = 52.5, what is the value of the test statistic (to 2 decimals)?
Can it be concluded that the population mean is greater than 50?
b.With x = 51, what is the value of the test statistic (to 2 decimals)?
Can it be concluded that the population mean is greater than 50?
c.With x = 51.8, what is the value of the test statistic (to 2 decimals)?
Can it be concluded that the population mean is greater than 50?
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