SOLUTION: Construct a 95% confidence interval for the population mean, μ. Assume the population has a normal distribution. A sample of 25 randomly English majors has a mean test score

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Question 821573: Construct a 95% confidence interval for the population mean, μ. Assume the population has a
normal distribution. A sample of 25 randomly English majors has a mean test score of 81.5 with a
standard deviation of 10.2.

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

Hi,

A sample of 25 randomly English majors has a mean test score of 81.5 with a 

standard deviation of 10.2. 

ME = 1.96%2810.2%2Fsqrt%2825%29%29 = 3.9984

95% confidence interval for the population mean, μ.

  81.5 - 4< mu < 81.5 + 4