Statistics and Probability Practice Quiz 1

Which of the following is a random variable?

• the number of occupied seats

• the time it takes to travel from home to school

• the amount of milk consumed by babies in a day

• all of the choices

Which CANNOT be a value of a random variable?

Answer explanation

The value of a random variable cannot be an imaginary number.

Suppose that 1 out of 5 chairs delivered by a company is damaged. If a school receives 3 of these chairs, then what are the possible values of the random variable 𝑋 representing the number of damaged chairs?

Answer explanation

The maximum number of damaged chairs is 1 and it is possible that no damaged chairs will be received by the school.

Tags

CCSS.HSS.CP.A.1

• 0

• 1

• 2

• 3

Answer explanation

The number of odd and even numbers in a die are equal. Therefore, the difference is 0.

What random variable produces set of possible outcomes that is measurable?

• continuous random variable

• discrete random variable

• both continuous and discrete random variable

• none of these choices

Answer explanation

Continuous random variable is measurable and discrete random variable is countable.