mean and sd of random variables
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Last updated 3:55 AM on 7/28/25
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5 Terms
1
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what is E(x)
the sum of all [x • p(x)]…
2
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what is var(x)
sum of (x-E(x))² x p(x)… continuing on
3
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sd
sq root of the var(x)
4
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What happens when there’s an value added/subtracted to the distribution?
mean follows suit in adding/subtraction
SD does not follow this
5
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What happens when there’s an value multiplied/divided to the distribution?
both mean and SD follow suit to whichever operation is performed on the distribution
Note 
Flashcards (49)