Question: With sample mean x = 12.5, sample size n = 40 and population standard deviation= 4 find 99% confidence interval for population mean. Use formula

  1. With sample mean x = 12.5, sample size n = 40 and population standard deviation= 4 find 99% confidence interval for population mean. Use formula on page 312 with z/2= 2.575

    between 11.5 and 13.5

    between 10.9 and 14.1

    between 10.1 and 15.1

    between 7.4 and 14.2

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