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If a school district takes a random sample of 81 Math SAT scores and finds that...

If a school district takes a random sample of 81 Math SAT scores and finds that the average is 486, and knowing that the population standard deviation of Math SAT scores is intended to be 100. Find a 99% confidence interval for the mean math SAT score for this district.

? ≤ μ≤ ≤

If a school district takes a random sample of 81 Math SAT scores and finds that the average is 486, and knowing that the population standard deviation of Math SAT scores is intended to be 100. Find a 99% confidence interval for the mean math SAT score for this district.

? ≤ u ≤  ?

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Answer : 99% confidence interval is 457.38 ≤ u ≤ 514.62

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