A researcher in interested in whether students who attend private elementary schools do any better on a standard test of intelligence than the general population of elementary school children.A random sample of 75 students at a private elementary school is tested and has a mean intelligence test score of 103.5.The average for the general population of elementary school children is 100 ($\sigma$ = 15).

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The Answer of A researcher in interested in whether students who attend private elementary schools do any better on a standard test of intelligence than the general population of elementary school children.A random sample of 75 students at a private elementary school is tested and has a mean intelligence test score of 103.5.The average for the general population of elementary school children is 100 ($\sigma$ = 15).

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A Researcher in Interested in Whether Students Who Attend Private $\sigma$