SOLUTION: Nine software engineers were interviewed to develop an estimate for software lines of code. The mean estimate is 12480 lines of code with a standard deviation of 2400 lines of code

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Question 946869: Nine software engineers were interviewed to develop an estimate for software lines of code. The mean estimate is 12480 lines of code with a standard deviation of 2400 lines of code. Develop an 90% confidence interval for the population mean.
Answer by stanbon(75887) About Me  (Show Source):
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Nine software engineers were interviewed to develop an estimate for software lines of code. The mean estimate is 12480 lines of code with a standard deviation of 2400 lines of code. Develop an 90% confidence interval for the population mean.
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sample mean:: x-bar = 12480
Margin of Error:: ME = 1.645*2400/sqrt(9) = 1315.88
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90% CI:: 12480-1315.88 < u < 12480+1315.88
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Cheers,
Stan H.
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