(1) Suppose a research company surveys workers in theUnited States to determine

Question

(1) Suppose a research company surveys workers in theUnited States to determine the number of times they are absent fromwork in a given year. What is the random variable for this survey?Is the random variable discrete or continuous?

2)A manufacturing company wants to determine the lifetimein hours of flashlight batteries. What is the random variable? Isthe random variable discrete or continuous?

3)Suppose a health insurance company surveys its customersto determine the number of children under age 25 living in eachhousehold. What is the random variable for this survey? Is therandom variable discrete or continuous?

Explanation / Answer

(1) random variable for this survey is the number of timesworkers are absent from work in a given year. the randomvariable is discrete because it can take on only a countable numberof distinct values such as 0,1,2,3,4,........

2)random variable is the lifetime in hours of flashlightbatteries. random variable Is continuous because it can takean infinite number of possible values.

3) random variable is the number of children under age 25living in each household. random variable is discrete becausebecause it can take on only a countable number of distinct valuessuch as 0,1,2,3,4,........

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