Find the expected value of each random variable: a.  x 10 20 30 P(X=x) 0.3 0.5 0.2   b.  x 2 3 4 5 P(X=x) 0.3 0.4 0.2 0.1   c) Find the standard deviation

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A: It is an important part of statistics . It is widely used .

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A: As per our guidelines we are suppose to answer only one question. E(X)=∑X.P(X)

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Q: The random variable x represents the number of credit cards that adults have along with the…

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Q: a. Find the expected value of each discrete probability distribution. 5. 7. 8. 10 P(x) 0.15 0.32…

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Q: Consider the discrete random variable X given in the table below. Calculate the mean, variance, and…

A: Note: Thank you for the question. Since multiple questions are posted, according to our policy, we…

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A: Given Formulas : Expected Value  , μ = 16×0.5 = 8 Variance , σ2 = 16×0.5×0.5 = 4 Standard…

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A: Solution: Note: Hello! As you have posted more than 3 sub parts, we are answering the first 3…

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A: Given : X ~ B(9,0.55) If X ~ B(n,p) then,  Mean : E(X) = n*p Here, n = 9 p = 0.55

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A: Consider the table:

Q: The number of computers sold per day at a local computer store, along with its corresponding…

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A: To find: The expected value and standard deviation of X.

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A: Given See the handwritten solution

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A: Option D is correct.

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A: mean=expected value=E(X)=∑xP(X)

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Q: The random variable x represents the number of credit cards that adults have along with the…

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A: By using online calculator

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A: Since multiple parts are given , first  part is  answered with detailed explanation. Please repost…