The frequency distribution shows a sample of the waterfall heights, in feet, of 28 waterfalls. Find the

Question:

The frequency distribution shows a sample of the waterfall heights, in feet, of 28 waterfalls. Find the variance and standard deviation for the data.

Class boundaries Frequency
52.5–185.5 8
185.5–318.5 11
318.5–451.5 2
451.5–584.5 1
584.5–717.5 4
717.5–850.5 2

Distribution
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