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How many rounds of golf do those physicians who play golf play per year? A survey...

How many rounds of golf do those physicians who play golf play per year? A survey of 12 physicians revealed the following numbers:

6,38,17,3,30,40,18,15,16,27,14,48

Estimate with 90% confidence the mean number of rounds played per year by physicians, assuming that the population is normally distributed with a standard deviation of 8.

Note: For each confidence interval, enter your answer in the form (LCL, UCL).

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