SOLUTION: The mean of a normal probability distribution is 615; the standard deviation is 17. (a) About 68% of the observations lie between what two values? B) About 95% of the observ

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Question 1152581: The mean of a normal probability distribution is 615; the standard deviation is 17.

(a) About 68% of the observations lie between what two values?
B) About 95% of the observations lie between what two values?
c) Practically all of the observations lie between what two values?
Answer by Edwin McCravy(20062)   (Show Source): You can put this solution on YOUR website!
The mean of a normal probability distribution is 615; the standard deviation is 17.

(a) About 68% of the observations lie between what two values?
Between 615-17 and 615+17 which is between 598 and 632

B) About 95% of the observations lie between what two values?
Between 615-2(17) and 615+2(17) which is between 581 and 649

c) Practically all of the observations lie between what two values?
Between 615-3(17) and 615+3(17) which is between 564 and 666

Edwin
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