Discrete Probability Distributions

Classify: The numbers of cheeseburgers a fast-food restaurant serves each day

• Discrete

• Continuous

Which one of the following is a discrete random variable?

• Sam's height

• Sam weight

• Time Sam's runs the 110 m hurdles

• Amount of Sam's brothers and sisters

Tags

CCSS.HSS.MD.A.1

Classify: Height of a plant measured each day for 30 days.

• Discrete

• Continuous

Tags

CCSS.HSN.Q.A.1

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

• Discrete

• Continuous

Tags

CCSS.HSS.MD.A.1

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

• Discrete

• Continuous

Tags

CCSS.HSN.Q.A.1

Is this a probability distribution?

• No, the probabilities add up to 1.1

• Yes, the probabilities add up to 1.

• Yes, the probabilities are all between 0 and 1.

Is this a probability distribution?

• No, the probabilities add up to 1.1

• Yes, the probabilities add up to 1.

• Yes, the probabilities are all between 0 and 1.

The table represents the probability of guessing correct on a 5 question true-false quiz. Find the mean and the standard deviation.

• μ = .4; σ = 7.5

• μ = 2.5; σ = 1.1

• μ = 3; σ = 1.3

• μ = .1; σ = 0

Tags

CCSS.HSS.ID.A.4

CCSS.HSS.MD.A.2

CCSS.HSS.MD.A.3

The table above shows the number of cell phones per household in a small town. Find the mean (expected number of cell phones).

The table above shows the number of cell phones per household in a small town. Find the standard deviation.