Question

A random sample of 46 Foreign Language movies made since 2000 had a mean length of 130.9 minutes, with a standard deviation of 12.7 minutes.

Part 1 of 2 Construct a 99.8% confidence interval for the true mean length of all Foreign Language movies made since 2000. Round the answers to one decimal place.

2. A college admissions officer takes a simple random sample of 100 entering freshmen and computes their mean mathematics SAT score to be

463. Assume the population standard deviation is σ=113

(a) Construct a 99% confidence interval for the mean mathematics SAT score for the entering freshman class. Round the answer to the nearest whole number.

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Answer 1