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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:

7,41,14,3,32,41,18,15,18,26,10,49

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 7. Note: For each confidence interval, enter your answer in the form (LCL, UCL). You must include the parentheses and the comma between the confidence limits.

Confidence Interval =

Math   Statistics-And-Probability   
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Answer #1

given data and necessary calculation :-

z critical value for 90% confidence interval , both tailed test be:-

the 90% confidence the mean number of rounds played per year by physicians is:-

*** if you have any doubt regarding the problem ,please write it in the comment box...if satisfied,please UPVOTE.

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