SOLUTION: Roll an 8 sided die. Please create a probability distribution for this event and then find E[x] and E[x2].

SOLUTION: Roll an 8 sided die. Please create a probability distribution for this event and then find E[x] and E[x2].

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Question 771791: Roll an 8 sided die. Please create a probability distribution for this event and then find E[x] and E[x2].
Answer by oscargut(2103) (Show Source): You can put this solution on YOUR website!

Probability distribution:
Range of X = {1,2,3,4,5,6,7,8}
P(X = i) = 1/8 for 1<=i<=8
E(x) = (1/8)(1+2+3+4+5+6+7+8) = 36/8 = 4.5
E(x2) = (1/8)(1+4+9+16+25+36+49+64)= 204/8 = 25.5

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