A random variable isa. any phenomenon in which outcomes are equally likely.O b. a hypothetical list of the possible outcomes of a random phenomenon.O c. any number that changes in a predictable way in the long run.a variable whose value is a numerical outcome associated with a random phenomenon.d. A small store keeps track of the number X of customers that make a purchase during the first hour that thestore is open each day. Based on the records, X has the following probability distribution.4.P(X)0.10.10.10.10.6The mean number of customers that make a purchase during the first hour that the store is open is:а. 2.9O b. 2.5О с. 2.0O d. 3.0

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Answered: A small store keeps track of the number…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A technician services mailing machines at companies in the Phoenix area. Depending on the type of malfunction, the service call can take 0.9,1.8,2.7,or 3.6 hours. The different types of malfunctions occur at the same frequency. a. Develop a probability distribution for the duration of a service call. Duration of Call x f(x) 0.9 1.8 2.7 3.6 Total b. What is the probability a service call will take 2.7 hours ? c. A service call has just come in, but the type of malfunction is unknown. It is 3:00 P.M. and service technicians usually get off at 5:00 P.M. What is the probability the service technician will have to work overtime to fix the machine today?
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