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EE3713
APPLIEDPROBABILITYANDSTATISTICSFORELECTRICAL
ENGINEERSChapter3
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E[Y]
Suppose random variable Y has PMF, what is E[Y]:
Calculation of E[Y]
6
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(d)
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Difference between your score and the mean
Suppose you score a 73 on an assignment where the mean is 80. How do you think of your score? Do you think I am 7 points below the mean? What is the expected value of the new derived random variable that is your score minus the mean?
