#1

The table to the right lists probabilities for the corresponding numbers of girls in three births. What is the randomvariable, what are its possiblevalues, and are its valuesnumerical?

Number of girls x P(x)

0 0.125

1 0.375

2 0.375

3 0.125

Choose the correct answer below.

A. The random variable isx, which is the number of girls in three births. The possible values of x are0, 1,2, and 3. The values of the random value x are numerical.

B. The random variable isP(x), which is the probability of a number of girls in three births. The possible values ofP(x) are 0.125 and 0.375. The values of the random valueP(x) are not numerical.

C. The random variable isP(x), which is the probability of a number of girls in three births. The possible values ofP(x) are 0.125 and 0.375. The values of the random valueP(x) are numerical.

D. The random variable isx, which is the number of girls in three births. The possible values of x are0, 1,2, and 3. The values of the random value x are not numerical.

#3

Determine whether the value is a discrete randomvariable, continuous randomvariable, or not a random variable.

a. The numberofpeopleinarestaurantthathasacapacityof250

b. The numberofpeoplewithbloodtypeAinarandomsampleof30people

c. The responsetothesurveyquestion"Didyousmokeinthelastweek?"

d. The distanceabaseballtravelsintheairafterbeinghit

e. The numberofpointsscoredduringabasketballgame

f. The amountofraininCityBduringApril

a. Is the numberofpeopleinarestaurantthathasacapacityof250 a discrete randomvariable, a continuous randomvariable, or not a randomvariable?

A. It is a discrete random variable.

B. It is a continuous random variable.

C. It is not a random variable.

b. Is the numberofpeoplewithbloodtypeAinarandomsampleof30people a discrete randomvariable, a continuous randomvariable, or not a randomvariable?

A. It is a continuous random variable.

B. It is a discrete random variable.

C. It is not a random variable

c. Is the responsetothesurveyquestion"Didyousmokeinthelastweek?" a discrete randomvariable, a continuous randomvariable, or not a randomvariable?

A. It is a discrete random variable.

B. It is a continuous random variable.

C. It is not a random variable.

d. Is the distanceabaseballtravelsintheairafterbeinghit a discrete randomvariable, a continuous randomvariable, or not a randomvariable?

A. It is a continuous random variable.

B. It is a discrete random variable.

C. It is not a random variable.

e. Is the numberofpointsscoredduringabasketballgame a discrete randomvariable, a continuous randomvariable, or not a randomvariable?

A. It is a continuous random variable.

B. It is a discrete random variable.

C. It is not a random variable.

f. Is the amountofraininCityBduringApril a discrete randomvariable, a continuous randomvariable, or not a randomvariable?

A. It is a continuous random variable.

B. It is a discrete random variable.

C. It is not a random variable.

Section 5.1

#3

Determine whether the value is a discrete randomvariable, continuous randomvariable, or not a random variable.

a. The numberofpoints scored during a basketball game

b. The numberoffree-throw attempts before the first shot is made

c. The responsetothesurveyquestion"Didyousmokeinthelastweek?"

d. The number of statistics students now reading a book

e. The weight of a T-bone steak

f. The number of bald eagles in a country

a. Is the numberofpoints scored during a basketball game a discrete randomvariable, continuous randomvariable, or not a random variable.

A. It is a discrete random variable.

B. It is a continuous random variable.

C. It is not a random variable.

b. Is the numberoffree-throw attempts before the first shot is made a discrete randomvariable, a continuous randomvariable, or not a randomvariable?

A. It is a continuous random variable.

B. It is a discrete random variable.

C. It is not a random variable

c. Is the responsetothesurveyquestion"Didyousmokeinthelastweek?" a discrete randomvariable, a continuous randomvariable, or not a randomvariable?

A. It is a discrete random variable.

B. It is a continuous random variable.

C. It is not a random variable.

d. Is the number of statistics students now reading a book a discrete randomvariable, a continuous randomvariable, or not a randomvariable?

A. It is a continuous random variable.

B. It is a discrete random variable.

C. It is not a random variable.

e. Is the weight of a T-bone steak a discrete randomvariable, a continuous randomvariable, or not a randomvariable?

A. It is a continuous random variable.

B. It is a discrete random variable.

C. It is not a random variable.

f. Is the number of bald eagles in a country a discrete randomvariable, a continuous randomvariable, or not a randomvariable?

A. It is a continuous random variable.

B. It is a discrete random variable.

C. It is not a random variable.

#4

Determine whether the value is a discrete randomvariable, continuous randomvariable, or not a random variable.

a. The height of a randomly selected person

b. The "yes" or "no" response to a survey question

c. The number of statistics students now doing their homework

d. The number of pigeons in a country

e. The weight of a hamburger

f. The time required to upload a file to the Internet

a. Is the height of a randomly selected person a discrete randomvariable, a continuous randomvariable, or not a randomvariable?

A. It is a discrete random variable.

B. It is a continuous random variable.

C. It is not a random variable.

b. Is the "yes" or "no" response to a survey question a discrete randomvariable, a continuous randomvariable, or not a randomvariable?

A. It is a continuous random variable.

B. It is a discrete random variable.

C. It is not a random variable

c. Is the number of statistics students now doing their homework a discrete randomvariable, a continuous randomvariable, or not a randomvariable?

A. It is a discrete random variable.

B. It is a continuous random variable.

C. It is not a random variable.

d. Is the number of pigeons in a country a discrete randomvariable, a continuous randomvariable, or not a randomvariable?

A. It is a continuous random variable.

B. It is a discrete random variable.

C. It is not a random variable.

e. Is the weight of a hamburger a discrete randomvariable, a continuous randomvariable, or not a randomvariable?

A. It is a continuous random variable.

B. It is a discrete random variable.

C. It is not a random variable.

f. Is the time required to upload a file to the Internet a discrete randomvariable, a continuous randomvariable, or not a randomvariable?

A. It is a continuous random variable.

B. It is a discrete random variable.

C. It is not a random variable.