(a) Can a binomial random variable X have a mean = 7 and the variance = 11. Why or why not? %3D
(a) Can a binomial random variable X have a mean = 7 and the variance = 11. Why or why not? %3D
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Transcribed Image Text:Following are three different questions:
(a) Can a binomial random variable X have a mean = 7 and the variance = 11. Why or why not?
(b) The mean and variance of the binomial distribution are 3 and 2 respectively. Find the probability that
the variate takes values less than or equal to 2.
(c) Let X1, X2, X3 each be an independent exponential random variable with mean 3 and Y=X1+ X2 +X3
then find the value of B such that P(|Y-ul<54)2Bß. where u is mean of Y
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