According to the empirical rule, almost all the data should lie between ( x 3s) and

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According to the empirical rule, almost all the data should lie between (¯ x  3s) and (¯ x  3s).

The range accounts for all the data.

a. What relationship should hold (approximately)

between the standard deviation and the range?

b. How can you use the results of part a to estimate the standard deviation in situations when the range is known?

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