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What is the 99 confidence interval for the average number

A study of 50 professors showed that the average time they spent creating test questions was 17.5 minutes per question. The standard deviation of the population is 5.8. What is the 99% confidence interval for the average number of minutes it takes to create a test question?

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Basic Statistics: What is the 99 confidence interval for the average number

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Basic Statistics: What is the 99 confidence interval for the average number

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