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September 20, 2014

September 20, 2014

Posted by **Julia Brown** on Friday, June 4, 2010 at 8:36pm.

- Statistics -
**MathGuru**, Sunday, June 6, 2010 at 9:47pmNull hypothesis:

Ho: p = .80 -->meaning: population proportion is equal to .80

Alternate hypothesis:

Ha: p does not equal .80 -->meaning: population proportion does not equal .80

Using a formula for a binomial proportion one-sample z-test with your data included, we have:

z = .77 - .80 / √[(.80)(.20)/400]

Finish the calculation.

Use a z-table to find the p-value.

(The p-value is the actual level of the test statistic.) Determine whether or not to reject the null.

I hope this will help get you started.

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