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Statistics

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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.

  • Statistics - ,

    95% = mean ± 1.96 SEm

    SEm = SD/√n

    I'll let you do the calculations.

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