Find the 50-th percentile of X. That is to say the value of x such that P (X ≤ x) = 0.5.   b. Now say you have two independent jet engines. What is the probability that only one of them will last more than 12 months before needing to be rebuilt?   c. Find the probability density function f(x) by taking the derivative of F(x) with respect to x.

Functions and Change: A Modeling Approach to College Algebra (MindTap Course List)
6th Edition
ISBN:9781337111348
Author:Bruce Crauder, Benny Evans, Alan Noell
Publisher:Bruce Crauder, Benny Evans, Alan Noell
Chapter1: Functions
Section1.2: Functions Given By Tables
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a. Find the 50-th percentile of X. That is to say the value of x such that P (X x) = 0.5.
 
b. Now say you have two independent jet engines. What is the probability that only one of them
will last more than 12 months before needing to be rebuilt?
 
c. Find the probability density function f(x) by taking the derivative of F(x) with respect to x.

 
 
4. Define the continuous random variable X as the time (in months) a jet engine can operate before
needing to be rebuilt. The cumulative distribution function F(x) (P(X ≤ x)) is given to be (note
this is the cumulative distribution function F(x), not the density function f(x)):
F(x) = P(X ≤ x) =
0
{:
1 — exp (-0.03x¹.2) = 1 – 6
-0.03x
1.2
x ≤ 0
0 < x <∞
Transcribed Image Text:4. Define the continuous random variable X as the time (in months) a jet engine can operate before needing to be rebuilt. The cumulative distribution function F(x) (P(X ≤ x)) is given to be (note this is the cumulative distribution function F(x), not the density function f(x)): F(x) = P(X ≤ x) = 0 {: 1 — exp (-0.03x¹.2) = 1 – 6 -0.03x 1.2 x ≤ 0 0 < x <∞
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