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statistics

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a. A statistics practitioner randomly sampled 100 observations from a population with a standard deviation of 5 and found that x is 10. Estimate the population mean with 90% confidence.

  • statistics -

    Formula:
    CI90 = mean + or - 1.645(sd/√n)

    sd = standard deviation
    n = sample size

    Substitute the values from your problem into the formula and calculate.

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