Let X be a random variable with the following probability distribution. Value x of X P (X = x) 20 0.10 30 0.30 40 0.30 50 0.05 60 0.25 Complete the following. (If necessary, consult a list of formulas.) (a) Find the expectation E (X) of X. E (X)= (b) Find the variance Var (X) of X. Var (X)=
Let X be a random variable with the following probability distribution. Value x of X P (X = x) 20 0.10 30 0.30 40 0.30 50 0.05 60 0.25 Complete the following. (If necessary, consult a list of formulas.) (a) Find the expectation E (X) of X. E (X)= (b) Find the variance Var (X) of X. Var (X)=
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.3: Special Probability Density Functions
Problem 54E
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Question
Let X be a random variable with the following probability distribution.
| Value
x
X
|
P (X = x)
|
|---|---|
| 20 | 0.10 |
| 30 | 0.30 |
| 40 | 0.30 |
| 50 | 0.05 |
| 60 | 0.25 |
Complete the following. (If necessary, consult a list of formulas.)
|
|
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