Question

An IQ test is designed so that the mean is 100 and the standard deviation is12 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 99​% confidence that the sample mean is within 3 IQ points of the true mean. Assume that σ=12 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 _________ ​(Round up to the nearest​ integer.)

Would it be reasonable to sample this number of​ students?

Yes.This number of IQ test scores is a fairly small number.

Yes. This number of IQ test scores is a fairly largenumber.

No.This number of IQ test scores is a fairly large number.

No. This number of IQ test scores is a fairly small number.

Answer 1

Hence, n=107

The required sample size is ___107______ ​

Would it be reasonable to sample this number of​ students?

Ans) Yes. This number of IQ test scores is a fairly large number.

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