SOLUTION: A random sample of 40 tomato plants has a mean yield of 12 pounds with a standard deviation of 4 pounds. Construct a 90% confidence interval for the population mean.

Question 921037: A random sample of 40 tomato plants has a mean yield of 12 pounds with a standard deviation of 4 pounds. Construct a 90% confidence interval for the population mean.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A random sample of 40 tomato plants has a mean yield of 12 pounds with a standard deviation of 4 pounds. Construct a 90% confidence interval for the population mean.
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sample mean = x-bar = 12 lbs
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Margin of Error = 1.645*4/sqrt(40) = 1.403
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90% CI: 12 - 1.403 < u < 12 + 1.403
90% CI: 10.95 < u < 13.403
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Cheers,
Stan H.
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