SOLUTION: Please help me solve this: find the probability distribution for the random variable X, the total rolled with a pair of dice. Obtain the: (a)mean

Question 1026280: Please help me solve this:
find the probability distribution for the random variable X, the total rolled with a pair of dice.
Obtain the:
(a)mean
(b)variance
(c)standard deviation
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
find the probability distribution for the random variable X, the total rolled with a pair of dice.
Sketch a 6 by 6 square with rows 1,2,..6 and columns 1,2,...6
Fill the square the row+colume sums:: 2,3,4..7;3,4,5..8.....7,8,9..12
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Obtain the:
(a)mean :: add the sums and divide by 36 to get the mean
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(b)variance:: use your variance formula
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(c)standard deviation = sqrt(variance)
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Cheers,
Stan H.
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