Question

The following data represent the pH of rain for a random sample of 12 rain dates...

The following data represent the pH of rain for a random sample of 12 rain dates in a particular region.

4.54
5.31
5.10
4.88
4.77
4.83
5.69
4.77
5.11
4.84
4.65
4.55

A normal probability plot suggests the data could come from a population that is normally distributed. A boxplot indicates there are no outliers. The sample standard deviation is s=0.334.

Construct and interpret a 99​% confidence interval for the standard deviation pH of rainwater in this region.

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Math   Statistics-And-Probability   
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