A college admissions officer takes a simple random sample of 100 entering freshmen and computes their mean mathematics SAT score to be 437. Assume the population standard deviation is σ = 115. Construct a 99.9% confidence interval for the mean mathematics SAT score for the entering freshman class. Round the answer to the nearest whole number. A) A 99.9% confidence interval for the mean mathematics SAT score is ______< μ <__________
Added by Michael J.
Step 1
The standard error is calculated by dividing the standard deviation by the square root of the sample size. In this case, the standard deviation is 115 and the sample size is 100. So, the standard error is 115/√100 = 11.5. Show more…
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