Short Quiz Random Variable

Hobi tested 3 cellphones at random to know whether defective, nondefective or slightly defective. How many possible outcomes are there?

• 9

• 8

• 32

• 27

Which of the following is NOT an example of random variable?

• Height or weight
• Temperature in degrees Celsius
• Number of goals scored in a soccer game
• Eye color

In a family of 4 children, what is the probability that all children are boys?

• 1/4
• 1/8
• 1/2
• 1/16

The mean grade of students per homeroom is an example of what type of random variable?

• Neither discrete nor random.

• Discrete random variable
• Continuous random variable
• Both discrete and continuous

Which of the following best describes a variable?

• A constant value
• A fixed number
• A letter or symbol that represents a value
• A mathematical operation

A random variable produces what type of data?

• Ordinal data
• Categorical data
• Numerical data
• Qualitative data

Which of the following is NOT an example of continuous random variable?

• Number of children in a family

• Weight of a person

• Height of a building

• Time taken to complete a race

True or false: It is possible for a certain value of a random variable to be repeated.

• True
• Maybe
• False
• Depends on the mood of Sir Mon