SOLUTION: The 90% confidence interval based off a sample mean is 12 < u < 18. What is the sample mean?

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Question 1034005: The 90% confidence interval based off a sample mean is 12 < u < 18. What is the sample mean?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
The mean is the average of the limits.
x=%2812%2B18%29%2F2=30%2F2=15