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The scores on a standardized math test for 8th grade children form a normal distribution with...

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Statistics

The scores on a standardized math test for 8th grade childrenform a normal distribution with a mean of 80 and a standarddeviation of 12. (8 points)

a) What is the probability of obtaining a sample mean greaterthan 82 for a sample of n = 36?

b) What is the probability of obtaining a sample mean less than78 for a sample of n = 9?

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SOLUTIONFrom given dataThe scores on astandardized math test for 8th grade children form a normaldistribution with a mean    See Answer
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