7. A discrete random variable, X, has the following probability distribution: X P(X) _0.1 0.2 (a) (b) (c) xxlda 2 3 What is the probability that X is not more than 1? What is the probability that X is at least 2? Compute E(x), the expected value of x. 0.4 0.3

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.CR: Chapter 13 Review
Problem 6CR
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7.
A discrete random variable, X, has the following probability distribution:
(a)
(b)
(c)
(d)
(e)
X
0
1
2
WN
3
P(X)
0.1
0.2
0.4
0.3
What is the probability that X is not more than 1?
What is the probability that X is at least 2?
Compute E(x), the expected value of x.
Compute o², the variance of x.
Compute σ, the standard deviation of x.
Transcribed Image Text:7. A discrete random variable, X, has the following probability distribution: (a) (b) (c) (d) (e) X 0 1 2 WN 3 P(X) 0.1 0.2 0.4 0.3 What is the probability that X is not more than 1? What is the probability that X is at least 2? Compute E(x), the expected value of x. Compute o², the variance of x. Compute σ, the standard deviation of x.
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  • Compute σ2, the variance of x.
  • Compute σ, the standard deviation of x.
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