Question: If you know the expected value is 5 0 0 and the standard deviation is 1 2 , then which of the following can you

If you know the expected value is 500 and the standard deviation is 12, then which of the following can you say with approximately a 95 percent confidence rating?
A The activity will take from 494 to 506 days.
B The activity will take from 476 to 524 days.
The activity will take from 488 to 512 days.
D The activity will take from 464 to 536 days.
If you know the expected value is 500 and the standard

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