SOLUTION: In a random sample of 26 computers, the mean repair cost was $130 with a sample standard deviation of $36. Assume that the population is normally distributed.
a. Find the marg
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a. Find the marg
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Question 270107: In a random sample of 26 computers, the mean repair cost was $130 with a sample standard deviation of $36. Assume that the population is normally distributed.
a. Find the margin of error for a 95% confidence interval. Round your answer to the nearest hundredths.
b. Find a 95% confidence interval for the population mean . Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! In a random sample of 26 computers, the mean repair cost was $130 with a sample standard deviation of $36. Assume that the population is normally distributed.
a. Find the margin of error for a 95% confidence interval. Round your answer to the nearest hundredths.
E = 1.96 = 13.84
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b. Find a 95% confidence interval for the population mean
CI: 130-13.84 < u < 130+13.84
CI: 116.16 < u < 143.84
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Cheers,
Stan H.
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