A simple random sample of 85 is drawn from a normally distributed population, and the mean is found to be 146, with a standard deviation of

Question

A simple random sample of 85 is drawn from a normally distributed population, and the mean is found to be 146, with a standard deviation of 34. Which of the following values is outside the 99% confidence interval for the population mean?

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Liliana 1 week 2021-09-10T11:16:39+00:00 2 Answers 0

Answers ( )

  1. Answer:

    A. the value of 135 because it is not greater than 136.5

    0
    2021-09-10T11:18:17+00:00

    Answer:

    anything below 136.5 or above 155.5

    Step-by-step explanation:

    the critical value from a Z distribution for the 99% confidence level is 2.576

    so we just need to compute

    146 + 2.576(34/sqrt(85))

    and

    146 + 2.576(34/sqrt(85))

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