Random Variables and Probability Distribution - PST

Which of the following random variables should be considered continuous?

• The number of brothers a randomly chosen person has
• The number of orders received by a mail order company in a randomly chosen week
• The number of cars owned by a randomly chosen adult male
• The time it takes a randomly chosen woman to run 100 meters

What is the difference between a discrete random variable and a continuous random variable?

• A discrete random variable takes all values in an interval of numbers while a continuous random variable has a fixed set of possible values with gaps between.
• A discrete random variable has a fixed set of possible values with gaps between while a continuous random variable takes all values in an interval of numbers.
• A discrete random variable takes only negative numbers while a continuous random variable takes both positive and negative numbers.
• A discrete random variable takes both positive and negative numbers while a continuous random takes only negative numbers.

What are random variables?

• Values that can easily be quantified

• Values that are determined by chance

• Values that are consistent

• Values that are from fixed outcomes

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

Adam earns $10 for each car he washes.

• Discrete
• Continuous

Tags

CCSS.HSF-LE.A.1B

The number of school lunches sold during the month. 

• Discrete
• Continuous

Tags

CCSS.6.SP.B.5

Mario has type O blood type

• Discrete

• Continuous