Thread: math wiz?
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Old 06-30-08, 08:44 PM
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Kham Kham is offline
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Re: math wiz?

CRAP! we were wrong. doc's right. 36 has to be accounted for. problem ask for "mean" not single value.

so z score = (76.8 - 74) / (12 / square root of 36) = 1.4

so 1 - P(Z > 1.4) = .9192 ==> 1 - .9192 = .0808 which is 8.08%

--> me
Last edited by Kham : 06-30-08 at 08:53 PM.
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