Why is the exact mathematical expectation 1/2 and the variance 1/12?

A

Alexander Nikolaevich2017-04-01 12:30:49

higher mathematics

Alexander Nikolaevich, 2017-04-01 12:30:49

The task says to get n values using random then compare the sample variance with the exact values Ma=1/2 , Da=1/12 for different n.
Why Ma=1/2 , Da=1/12?

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