Pregunta
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A random variable is defined as a process or variable with a numerical outcome. Which of the following are random variables? a. The amount of snow, in inches, that will fall next winter in Aspen, CO. b. The job of a randomly picked person that is taking the subway. c. The number of movies that will be released next week by your local movie theater.

Ask by Rodriguez Romero. in the United States
Feb 25,2025

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Options a and c are random variables.

Solución

A random variable must be associated with a numerical outcome. a. The amount of snow, in inches, is numerical, so it is a random variable. b. The job of a person is categorical (e.g., teacher, engineer) and does not have a numerical outcome, so it is not a random variable in the usual sense. c. The number of movies is a numerical value, so it is a random variable. Thus, options a and c are random variables.

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Bonus Knowledge

The amount of snow, in inches, that will fall next winter in Aspen, CO, is a classic example of a random variable because it is uncertain and can take on a range of numerical values depending on the weather conditions. Fun fact: meteorologists often rely on statistical models to predict snowfall amounts, making this field both an art and science! The number of movies that will be released next week by your local movie theater is also a random variable since it can vary with each week and is quantifiable. Typically, movie release schedules fluctuate based on various factors, such as holidays and competition from other films, adding an element of suspense to any movie lover's planning!

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