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Find the expected value E(X) of a random variable X having the following probability distribution. (Enter an exact number as an integer, fraction, or decimal.) E(X) = x -3 -1 1 3 5 7 P(X = x) \frac{1}{8} \frac{1}{4} \frac{3}{16} \frac{1}{4} \frac{1}{16} \frac{1}{8} Need Help? Read it Show My Work (Optional)

          Find the expected value E(X) of a random variable X having the following probability distribution. (Enter an exact number as an integer, fraction, or decimal.)
E(X) = 


x	-3	-1	1	3	5	7
P(X = x)	\frac{1}{8}	\frac{1}{4}	\frac{3}{16}	\frac{1}{4}	\frac{1}{16}	\frac{1}{8}

Need Help? Read it
Show My Work (Optional)
        
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Find the expected value E(X) of a random variable X having the following probability distribution. (Enter an exact number as an integer, fraction, or decimal.)
E(X) = 


x	-3	-1	1	3	5	7
P(X = x)	(1)/(8)	(1)/(4)	(3)/(16)	(1)/(4)	(1)/(16)	(1)/(8)

Need Help? Read it
Show My Work (Optional)

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Elementary and Intermediate Algebra
Elementary and Intermediate Algebra
Alan S. Tussy, R. David Gustafson 5th Edition
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Find the expected value E(X) of a random variable X having the following probability distribution. (Enter an exact number as an integer, fraction, or decimal.) E(X) = + 3 -1 3 5 7 1 3 1 1 1 P(X=x) |8 4 16 4 16 8
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Transcript

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00:01 For this question, we have to find the expected value.
00:03 First of all, let's remember how we can just get the expected value of any random variable here.
00:09 Let's say we have the random variable x and the expected value, which is the sum of the values.
00:14 So we're going to use this notation for the sum, for the math, which is the random variable xi and times the probability of xi.
00:24 So this sum just gives us the expected value of the distribution here...
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