e) What is the probability that X is> 5? 0.0821 f) What is the probability that X is> 107 0.0067 Enter a number. g) What is the probability that X > 10 given that X > 5?

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Chapter1: Combinatorial Analysis
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Need the ans for g and h

4.
DETAILS
a) What is the expected value of X? 2
The lifetime, X, of a particular integrated circuit has an exponential distribution with rate of λ=0.5 per year. Thus, the density of X is:
f(x,^) = λ e-^x for 0 ≤ x ≤ ∞, λ = 0.5. is what R calls rate.
Hint: This is a problem involving the exponential distribution. Knowing the parameter for the distribution allows you to easily answer parts a,b,c and use the built-in R functions for the
exponential distribution (dexp(), pexp(), qexp()) for other parts. Or (not recommended) you should be able to use the R integrate command with f(x) defined as above or with dexp() for all parts.
b) What is the variance of X?
c) What is the standard deviation of X? 2
d) What is the probability that X is greater than its expected value? 0.3679
e) What is the probability that X is > 5? 0.0821
f) What is the probability that X is> 10? 0.0067
Enter a number.
g) What is the probability that X > 10 given that X > 5?
h) What is the median of X?
MY NOTES
1) Enter any comments in the text box below.
ASK YOUR TEACHER
Transcribed Image Text:4. DETAILS a) What is the expected value of X? 2 The lifetime, X, of a particular integrated circuit has an exponential distribution with rate of λ=0.5 per year. Thus, the density of X is: f(x,^) = λ e-^x for 0 ≤ x ≤ ∞, λ = 0.5. is what R calls rate. Hint: This is a problem involving the exponential distribution. Knowing the parameter for the distribution allows you to easily answer parts a,b,c and use the built-in R functions for the exponential distribution (dexp(), pexp(), qexp()) for other parts. Or (not recommended) you should be able to use the R integrate command with f(x) defined as above or with dexp() for all parts. b) What is the variance of X? c) What is the standard deviation of X? 2 d) What is the probability that X is greater than its expected value? 0.3679 e) What is the probability that X is > 5? 0.0821 f) What is the probability that X is> 10? 0.0067 Enter a number. g) What is the probability that X > 10 given that X > 5? h) What is the median of X? MY NOTES 1) Enter any comments in the text box below. ASK YOUR TEACHER
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