The following are the percentages of ash content in 12
Chapter , Problem 13(choose chapter or problem)
The following are the percentages of ash content in 12 samples of coal found in close proximity: 9.2, 14.1, 9.8, 12.4, 16.0, 12.6, 22.7, 18.9, 21.0, 14.5, 20.4, 16.9 Find the (a) sample mean, and (b) sample standard deviation of these percentages.
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