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An IQ test is designed so that the mean is 100 and the standard deviation is...

An IQ test is designed so that the mean is 100 and the standard deviation is

2525

for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with

9090​%

confidence that the sample mean is within

66

IQ points of the true mean. Assume that

sigmaσequals=2525

and determine the required sample size using technology. Then determine if this is a reasonable sample size for a real world calculation.

The required sample size is

Math   Statistics-And-Probability   
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