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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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