Determining the confidence interval for the population mean
A computer repair service found that a random sample of 45 repair costs had a mean cost of $659. Assume that the population standard deviation is $125. Calculate the margin of error, E, for a 95% confidence interval for the population mean µ.
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A computer repair service found that a random sample of 45 repair costs had a mean cost of $659. Assume that the population standard deviation is $125. Calculate the margin of error, E, for a 95% confidence interval for the population mean µ
A cold storage room has walls made of 0.23 m of brick on the outside, 0.08 m of plastic foam find the rate of heat removal by refrigeration if the total wall area is 90 m^2.
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