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March 27, 2015

March 27, 2015

Posted by **Mike** on Monday, April 2, 2012 at 12:39pm.

- statistics -
**MathGuru**, Monday, April 2, 2012 at 6:48pmTry a one-sample z-test.

Hypotheses:

Ho: µ = 24.2 -->null hypothesis

Ha: µ does not equal 24.2 -->alternate hypothesis

Check the cutoff or critical value to reject the null using a z-table at 0.05 level for a two-tailed test. If the test statistic calculated exceeds either the positive or negative critical value from the table, reject the null and conclude a difference. If the test statistic does not exceed the critical value from the table, do not reject the null.

Use 23.5 as the sample mean.

Use 3.2 for standard deviation.

Use 120 for sample size.

I hope this will help get you started.

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