Classifying Random Variables as Discrete and Continuous

The time it takes you to drive to school.

• Continuous
• Discrete

The number of books in your locker.

• Continuous
• Discrete

The number of babies born at La Carlota City Health Center this month.

• Continuous

• Discrete

The time it takes for a light bulb to burn out.

• Continuous
• Discrete

The cost of your lunch at Burger King.

• Continuous

• Discrete

The weight of a sumo wrestler

• Continuous

• Discrete

Which of the following is not a random variable?

• The number of heads in ten tosses of a fair coin.
• The number of passengers in cars passing though a toll booth.
• The age of the driver in cars passing through a toll booth.
• The response of randomly-selected people to thequestion, “Did you eat breakfast this morning?”

Which of the following is not a random variable?

• The heights of randomly-selected buildings in New York City.
• The suit of a card randomly-selected from a 52-card deck.
• The number of children in randomly-selected households in the United States.
• The amount of money won (or lost) by next personto walk out of a casino in Las Vegas.

Which of the following is true about every random variable

• It takes on numerical or categorical values.
• It describes the results of a random phenomenon.
• It’s behavior can be described by a probability distribution.
• (b) and (c) are true, but not (a).

Which the following is a discrete random variable?

• The average weight of female players

• The average height of sumo wrestlers

• The amount of sugar in a cup

• The number of students in a class