Quiz 1.1.1 - 2.1.2 Statistics

Classify the following variable as discrete, continuous or neither.

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

• Neither

• Continuous

• Discrete

Is this function discrete or Continuous?

• Discrete

• Continuous

Tags

CCSS.HSF-LE.A.1B

Is this function discrete or continuous?

• discrete

• continuous

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.B.5

Classify the following variable as discrete, continuous or neither.

"The number of books in a university library"

• Neither

• Continuous

• Discrete

Classify the following variable as discrete, continuous or neither.

"The amount of time it takes to get to work"

• Neither

• Continuous

• Discrete

Classify the following variable as discrete, continuous or neither.

"The number of tornadoes in the month of June"

• Neither

• Continuous

• Discrete

A marketing survey compiled data on the number of cars in households.  If X = the number of cars in a randomly selected household, and we omit the rare cases of more than 5 cars, then X has the following probability distribution: 

Does this represent a valid probability distribution? Why or why not?

Tags

CCSS.HSS.MD.A.3

CCSS.HSS.MD.A.4

A small ferry runs every half hour from one side of a large river to the other. The number of cars X on a randomly chosen ferry trip has the probability distribution shown below.

Find the expected value, E(x). Show all of your work on your paper and type in your final answer. Do not round your final answer.

Tags

CCSS.HSS.MD.A.2

A small ferry runs every half hour from one side of a large river to the other. The number of cars X on a randomly chosen ferry trip has the probability distribution shown below.

Interpret the meaning of the expected value, E(x), in context of this problem.

• E(x) is the average number of cars expected on a randomly chosen ferry trip.

• E(x) is the probability of a car expected on a randomly chosen ferry trip.

• E(x) is a possible outcome of the cars expected on a randomly chosen ferry trip.

• E(x) is the expected value of x.

Tags

CCSS.HSS.MD.A.2

A small ferry runs every half hour from one side of a large river to the other. The number of cars X on a randomly chosen ferry trip has the probability distribution shown below.

Find the standard deviation. Show all of your work on your paper and type in your final answer. Do not round your final answer.