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A sample of 70 is used and the population standard deviation is 6. Use the critical...

A sample of 70 is used and the population standard deviation is 6. Use the critical value approach to state your conclusion for each of the following sample results. Use = .05.

a. With x̄ = 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 x̄ = 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 x̄ = 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?

Math   Statistics-And-Probability   
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