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January 26, 2015

January 26, 2015

Posted by **GLEN** on Wednesday, July 13, 2011 at 10:11am.

A.) Write appropriate hypothesis

B.) Are there necessary assumptions to make inferences satisfied?

C.) Describe the sampling distribution models of mean fuel economy for samples like this.

D.) Find the P- Value

E.) Explain what the p-vale means in this context?

F.) State an appropriate conclusion.

- stats -
**MathGuru**, Wednesday, July 13, 2011 at 6:17pmI'll give a few hints and let you take it from there.

Hypotheses:

Ho: µ ≥ 26

Ha: µ < 26

Try a z-test to determine the test statistic.

Formula:

z = (sample mean - population mean)/(standard deviation divided by the square root of the sample size)

With your data:

z = (25.02 - 26)/(4.83/√50)

Finish the calculation.

Once you have the z-test statistic, check a z-table for the p-value. The p-value is the actual level of the test statistic.

Determine your conclusion. If the null (Ho) is not rejected, there is no difference. If the null is rejected, accept Ha and conclude a difference.

I hope this will help.

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