44. A random variable is a variable whose value is determined by the: A) outcome

Question

44. A random variable is a variable whose value is determined by the: A) outcome of a random experiment B) random population C) random space D) random subjective probability 45. A discrete random variable is a random variable: A) that can assume any value in one or more intervals B) whose set of values is countable C) that is derived from a random population D) that is determined by random probability 46. A continuous random variable is a random variable: A) that can assume any value in one or more intervals B) whose set of values is countable C) that is derived from a random population D) that is determined by random probability 47. Which of the following is not an example of a discrete random variable? A) B) C) D) The number of days it rains in a month in New York The number of stocks a person owns The number of persons allergic to penicillin The time spent by a physician with a patient

Explanation / Answer

(44) A.  outcome of an random experiment.

A random variable is a variable whose value is unknown, or a function that assigns values to each of an experiment's outcomes.

(45) B. set of values is countable

A random variable is a variable whose value is a numerical outcome of a random phenomenon. Adiscrete random variable X has a countable number of possible values.

(46) A. that can assume any value in one or more interval

A continuous random variable is a random variable where the data can take infinitely many values. For example, a random variable measuring the time taken for something to be done iscontinuous since there are an infinite number of possible times that can be taken.

(47)D. The time spent by a physician with a patient

all others are countable except D,

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