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In a large population of college-educated adults, the mean IQ score is 112 with

ID: 3394819 • Letter: I

Question

In a large population of college-educated adults, the mean IQ score is 112 with standard deviation of 25. Suppose 300 adults from this population are randomly selected for a market research campaign. The distribution of the sample mean IQ is

(A) approximately Normal, mean 112, standard deviation 1.443.

(B) approximately Normal, mean 112, standard deviation 25.

(C) approximately Normal, mean 112, standard deviation 0.083.

(D) approximately Normal, mean equal to the observed value of the sample mean, standard deviation 25

(E) Cannot determine based on the information provided.

Explanation / Answer

option A

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