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The mean of a normal probability distribution is 420; the standard deviation is 17. a. About 68% of the observations lie between what two values?

The mean of a normal probability distribution is 420; the standard deviation is 17.

a.About 68% of the observations lie between what two values?

Lower Value

Upper Value

b.About 95% of the observations lie between what two values?

Lower Value

Upper Value

c.Nearly all of the observations lie between what two values?

Lower Value

Upper Value

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