The mean of a normal probability distribution is 500; the standard deviation is 10. a. About 68%

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The mean of a normal probability distribution is 500; the standard deviation is 10.
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?

Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...
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