Probability & Random Variables ReviewQuiz

What is a random variable?

• A number chosen by the teacher

• A variable with fixed outcomes

• A function that assigns numerical values to outcomes

• A letter that replaces a number

Which of the following is a discrete random variable?

• Temperature

• Height

• Number of cars sold

• Speed

What type of random variable measures weight?

• Discrete

• Constant

• Continuous

• Predictable

Which variable is not numerical?

• Age

• Marital status

• Height

• Number of coins

In tossing two coins, how many outcomes are possible?

• 2

• 4

• 6

• 8

If a random variable can only take countable values, it is:

• Continuous

• Discrete

• Constant

• Unmeasurable

What is the value of a random variable in the outcome HHT when counting tails?

• 0

• 1

• 2

• 3

What is the range of values for any probability?

• -1 to 1

• 0 to 1

• 0 to 100

• Depends on data

What is the probability of getting an even number in a single die roll?

• 1/6

• 1/2

• 1/3

• 2/3

Which of the following is not a random variable?

• Gender

• Score

• Number of siblings

• Test results