Math Is Fun Forum

cassrl

Member

Registered: 2012-10-03

Posts: 4

statistics

X score is normally distibuted with mean 90 and standard deviation 23 Find:
A-the probability of a score between 76 and 117
b-probability that the mean score of a sample of n=64 is greater than 97

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: statistics

Hi cassrl;

I am getting for A) .608421 as the probability.

For B) you use the central Limit Theorem. Please try that now.

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