A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN: 9780134753119
Author: Sheldon Ross
Publisher: PEARSON
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Let X denote the amount of time a book on two-hour reserve is actually checked out, and suppose the cdf is the following.
F(x)=
=
0
x²
25
1
X<0
0<x<5
(c) Calculate P(X > 4.5).
5≤X
Use the cdf to obtain the following. (If necessary, round your answer to four decimal places.)
(a) Calculate P(X ≤ 4),
(b) Calculate P(3.5 ≤ x ≤ 4).
(d) What is the median checkout duration ? [solve 0.5 = F(p)].
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Transcribed Image Text:Let X denote the amount of time a book on two-hour reserve is actually checked out, and suppose the cdf is the following. F(x)= = 0 x² 25 1 X<0 0<x<5 (c) Calculate P(X > 4.5). 5≤X Use the cdf to obtain the following. (If necessary, round your answer to four decimal places.) (a) Calculate P(X ≤ 4), (b) Calculate P(3.5 ≤ x ≤ 4). (d) What is the median checkout duration ? [solve 0.5 = F(p)].
(e) Obtain the density function f(x).
f(x)
F'(x)
=
(f) Calculate E(X).
(g) Calculate V(X) and
V(X)
0≤x<5
otherwise
(h) If the borrower is charged an amount h(x) = x² when checkout duration is X, compute the expected charge E[h(X)].
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Transcribed Image Text:(e) Obtain the density function f(x). f(x) F'(x) = (f) Calculate E(X). (g) Calculate V(X) and V(X) 0≤x<5 otherwise (h) If the borrower is charged an amount h(x) = x² when checkout duration is X, compute the expected charge E[h(X)].
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