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    Construct a 90% confidence interval for the population standard deviation

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    The grade point averages for 10 randomly selected students are listed in column 1 of the minitab worksheet. the distribution of GPAs is known to be approximately normally distributed.

    If possible, construct a 90% confidence interval for the population standard deviation. Interpret the meaning of the interval.

    GPAs
    2.0
    3.2
    1.6
    2.9
    0.9
    4.0
    3.3
    2.9
    3.6
    0.8

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    Solution Summary

    The solution constructs a 90% confidence interval for the population standard deviation. The meaning of the interval is interpreted.

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