2.52 Histograms and standard deviation The figure shows histograms for three samples, each with sample size n = 100.

a. Which sample has the (i) largest and (ii) smallest standard deviation?

b. To which sample(s) is the empirical rule relevant? Why?

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1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 89 Histograms and relative sizes of standard deviations