Question

A professor finds that for 16 randomly selected students the time needed to complete an assignment...

  1. A professor finds that for 16 randomly selected students the time needed to complete an assignment had a sample mean of 64 minutes and a sample standard deviation of 20 minutes. If the time needed to complete the assignment is normally distributed, then the standard error of the mean is

    a.

    20
    b.

    16
    c.

    5
    d.

    4

QUESTION 24

  1. A professor finds that for 16 randomly selected students the time needed to complete an assignment had a sample mean of 64 minutes and a sample standard deviation of 20 minutes. If we need to develop an interval estimate of the mean, the appropriate distribution to use is:

    a.

    the Z distribution
    b.

    the t distribution
    c.

    the normal distribution
    d.

    none of the above
Math   Statistics-And-Probability   
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