In the book How to Lie with Charts, it is stated that the standard deviation is usually
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In the book How to Lie with Charts, it is stated that “the standard deviation is usually shown as plus or minus the difference between the high and the mean, and the low and the mean. For example, if the mean is 1, the high 3, and the low - 1, the standard deviation is ± 2” Is that statement correct? Why or why not?
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