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July 24, 2014

July 24, 2014

Posted by **melinda** on Wednesday, October 17, 2012 at 10:27am.

- staticstics -
**MathGuru**, Wednesday, October 17, 2012 at 7:07pmUse z-scores using sample size:

z = (x - mean)/(sd/√n)

Find two scores:

z = (32 - 30)/(5.7/√31)

z = (28 - 30)/(5.7/√31)

Find the probability between the two z-scores using a z-table. Subtract that value from 1 for your answer.

I hope this will help get you started.

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