Random Variable

A random variable is

• a hypothetical list of the possible outcomes of a random phenomenon.
• any phenomenon in which outcomes are equally likely.
• any number that changes in a predictable way in the long run.
• a variable whose value is a numerical outcome associated with a random phenomenon.

Which of the following random variables is NOT continuous?

• Amount of gasoline in a car.
• Time it takes to commute to work.
• Number of goals scored by a hockey team.
• Lifetime of a AAA battery.

Which one of the following is discrete data?

• Sam is 160 cm tall
• Sam weighs 60 lbs.
• Sam ran 100 meters in 10.2 seconds
• Sam has two brothers and one sister

Tags

CCSS.HSF-LE.A.1B

The time it takes for a car battery to die. 

• Discrete
• Continuous

Tags

CCSS.HSF-LE.A.1B

The weight of a package you are mailing at the post office.

• Discrete
• Continuous

Tags

CCSS.HSN.Q.A.1

CCSS.HSN.Q.A.3

How many miles it takes to use up a tank of gas. 

• Discrete
• Continuous

Tags

CCSS.HSF-LE.A.1B

In continuous functions, the x-values...

• Can be all numbers
• Can only be whole numbers
• Can only be decimals

Tags

CCSS.HSF.IF.A.1

CCSS.HSF.IF.A.2

CCSS.HSF.IF.B.5

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

• Discrete
• Continuous

Tags

CCSS.HSF-LE.A.1B

The number of school lunches sold during the month. 

• Discrete
• Continuous

Tags

CCSS.HSS.MD.A.1

The amount of milk produced yearly by a particular cow is

• Continuous RV

• Discrete RV

• Probability distribution function

• Probability density function