Show thát E(X) = np when X is a binomial random variable. [Hint: First'express E(X) as a sum with lower limit x = Then factor out np, let y = x - 1 so that the sum is from y = 0 to y = n – 1, and show that the sum equals 1.] 1. -
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![Show thát E(X) = np when X is a binomial random variable.
[Hint: First'express E(X) as a sum with lower limit x =
Then factor out np, let y = x - 1 so that the sum is from
y = 0 to y = n – 1, and show that the sum equals 1.]
1.
-](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F05efe7f9-5b49-422d-98b6-1579b28bd5be%2F0d4cd62c-4bf8-4771-95b1-1f4685d982d7%2Fcl27hwk_processed.png&w=3840&q=75)
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