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September 17, 2014

September 17, 2014

Posted by **Nadine** on Sunday, March 10, 2013 at 1:30pm.

Determine which test statistic you will use: the standard normal distribution, or the student’s t distribution. Explain why you chose this test statistic.

Establish the null and alternative hypotheses, state the claim.

Test the claim at and discuss your results, should you reject or not reject the null hypothesis, should you reject or except the claim.

- Statistics -
**MathGuru**, Monday, March 11, 2013 at 7:30pmTry a t-test since your sample size is rather small.

Formula:

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

sample mean = 8.2

population mean = 7.3

standard deviation = 1.4

sample size = 20

Plug in the values and calculate the t-test statistic.

Find the critical value for a one-tailed test using degrees of freedom (df = n - 1). Use a t-table. Compare to your t-test statistic calculated above. If the t-test statistic exceeds the critical value from the table, reject the null. If the t-test statistic does not exceed the critical value from the table, do not reject the null.

I hope this will help get you started.

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