SOLUTION: Construct a 90% confidence interval for the population mean, μ. Assume the population has a normal distribution. A sample of 15 randomly selected math majors has a grade poi

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Question 821570: Construct a 90% confidence interval for the population mean, μ. Assume the population has a
normal distribution. A sample of 15 randomly selected math majors has a grade point average of
2.86 with a standard deviation of 0.78.

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

A sample of 15 randomly selected math majors has a grade point average of 

2.86 with a standard deviation of 0.78. 

ME = 1.645%28.78%2Fsqrt%2815%29%29 = 

90% confidence interval for the population mean, μ.

  2.86 - ME < mu < 2.86 + ME