According to a survey by a telecommunications company, the probability of a call not being connected is 5%, and the probability density function of the call time when the call is connected is ƒ(x) = }e(−¹/5)x · I(0,∞) · (I(0,∞) (x) = 1 if 0 < x and I(0,∞) (x) = 0 otherwise.) (1) The random variable X denotes the call time. Find the distribution function of X. (2) Using (1), find the moment generating function of X.

A First Course in Probability (10th Edition)
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Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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According to a survey by a telecommunications
company, the probability of a call not being connected is 5%,
and the probability density function of the call time when the call is connected is
ƒ(x) = e(−¹/5)x · I(0,∞) ·
(I(0,∞) (x) = 1 if 0 < x and I(0,∞) (x) = 0 otherwise.)
(1) The random variable X denotes the call time. Find the distribution function of X.
(2) Using (1), find the moment generating function of X.
Transcribed Image Text:According to a survey by a telecommunications company, the probability of a call not being connected is 5%, and the probability density function of the call time when the call is connected is ƒ(x) = e(−¹/5)x · I(0,∞) · (I(0,∞) (x) = 1 if 0 < x and I(0,∞) (x) = 0 otherwise.) (1) The random variable X denotes the call time. Find the distribution function of X. (2) Using (1), find the moment generating function of X.
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