Consider the probability distribution below. x f(x) 20 0.05 30 0.35 40 0.45 50 0.15 The expected value is 37. Find the variance of x. Choices: 7.81 18.5 61 342.25
Consider the probability distribution below. x f(x) 20 0.05 30 0.35 40 0.45 50 0.15 The expected value is 37. Find the variance of x. Choices: 7.81 18.5 61 342.25
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 53E
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Question
Consider the probability distribution below.
x | f(x) |
---|---|
20 | 0.05 |
30 | 0.35 |
40 | 0.45 |
50 | 0.15 |
The expected value is 37. Find the variance of x.
Choices:
7.81
18.5
61
342.25
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