Quiz about Mean of Discrete Random Variable

Question 1

Identify whether the experiment involves a discrete or a continuous random variable.

Rotating a spinner that has 4 equally divided parts: blue, green, yellow, and red

Accepted Answer

Discrete Random Variable

Answer

Continuous Random Variable

Question 2

Identify whether the experiment involves a discrete or a continuous random variable.

Collecting data about the mileage per liter of a certain brand and model of a car

Accepted Answer

Continuous Random Variable

Answer

Discrete Random Variable

Question 3

Identify whether the experiment involves a discrete or a continuous random variable.

tossing a pair of fair coins

Accepted Answer

Discrete Random Variable

Answer

Continuous Random Variable

Question 4

Identify whether the experiment involves a discrete or a continuous random variable.

Recording the number of points scored by a NBA team in each game of the 2018 season

Accepted Answer

Discrete Random Variable

Answer

Continuous Random Variable

Question 5

Identify whether the experiment involves a discrete or a continuous random variable.

Number of phone calls answered by a call center agent during his/her shift

Accepted Answer

Discrete Random Variable

Answer

Continuous Random Variable

Question 6

Identify whether the experiment involves a discrete or a continuous random variable.

Recording number of medals that the Philippine team won in each of the past 20 Olympic games

Accepted Answer

Discrete Random Variable

Answer

Continuous Random Variable

Question 7

Identify whether the experiment involves a discrete or a continuous random variable.

Measuring the distance travelled by different cars using 1-liter of gasoline

Accepted Answer

Continuous Random Variable

Answer

Discrete Random Variable

Question 8

Identify whether the experiment involves a discrete or a continuous random variable.

Measuring the length of time it takes before a dolphin surfaces in the ocean to breath

Accepted Answer

Continuous Random Variable

Answer

Discrete Random Variable

Question 9

Identify whether the experiment involves a discrete or a continuous random variable.

Recording the number of times each student goes to the bathroom in each school day

Accepted Answer

Discrete Random Variable

Answer

Continuous Random Variable

Question 10

Identify whether the experiment involves a discrete or a continuous random variable.

Tallying the number of times a student has been late during the 1st term

Accepted Answer

Discrete Random Variable

Answer

Continuous Random Variable

Question 11

If P(A)=.45 and P(B)=.39 and P(A and B)=.20, find the P(A or B)

Accepted Answer

.64

Answer

.04

Answer

.3

Answer

.84

Question 12

If the P(A) = .45 and P(B) = .5 and the events are mutually exclusive, find P(A or B)

Accepted Answer

.95

Answer

.23

Answer

.05

Answer

.65

Question 13

If P(A) = .45 and P(B) =.35 and the P(B l A) = .25, find the P(A and B).

Accepted Answer

.11

Answer

.16

Answer

.04

Answer

.80

Question 14

You select and eat a candy from a jar and then select and eat a 2nd candy. Which is true?

Accepted Answer

These are dependent

Answer

These are independent

Question 15

You collect data on the students who own a car and the students who own a home. Which is true.

Accepted Answer

These events are not mutually exclusive

Answer

These events are mutually exclusive

Question 16

What is the complement of losing all games during baseball season?

Accepted Answer

Winning at least 1 game

Answer

Winning all games

Answer

Winning 4 games

Question 17

If you know what marbles are in a jar and you want to calculate the probability, you would be using which type?

Accepted Answer

Classical or Theoretical

Answer

Experimental or Empirical

Answer

Subjective

Question 18

If you know use data from fishing in the local lake to calculate the probability, you would be using which type?

Accepted Answer

Experimental or Empirical

Answer

Classical or Theoretical

Answer

Subjective

Question 19

What is the probability of selecting a King and then a 4 of Spades from a deck of cards without replacement?

Accepted Answer

.002

Answer

.097

Answer

.006

Answer

.001

Question 20

What is the probability of selecting a King and then a 4 of Spades from a deck of cards with replacement?

Accepted Answer

.001

Answer

.097

Answer

.006

Answer

.002

Question 21

You roll a die and flip a coin, what is the probability of rolling a number higher than 4 or land on heads?

Accepted Answer

.833

Answer

.167

Answer

.192

Answer

.25

Question 22

You roll a die and flip a coin, what is the probability of rolling a number higher than 4 and land on heads?

Accepted Answer

.167

Answer

.192

Answer

.833

Answer

.25

Question 23

You pull a card from a standard deck, what is the probability you pull out a jack given that it's a face card?

Accepted Answer

.333

Answer

.077

Answer

.25

Answer

.5

Question 24

There are 18 students in the class. The teacher needs 4 students for an experiment. How many ways can she make a group of 4?

Accepted Answer

3060

Answer

6120

Answer

73440

Answer

2460

Question 25

A local company says there is a .45 chance they will move locations and a .4 chance they will hire new employees. There is a .25 chance they will do both. What is the probability the company will either move or hire new employees?

Accepted Answer

.6

Answer

.7

Answer

.65

Answer

.85

Question 26

A local company says there is a .45 chance they will move locations and a .4 chance they will hire new employees. There is a .25 chance they will do both. What is the probability the company will neither move nor hire new employees?

Accepted Answer

.4

Answer

.35

Answer

.15

Answer

.6

Question 27

Identify the kind of variable in this situation:

length of time a football play lasts

Accepted Answer

continuous

Answer

nominal

Answer

ordinal

Answer

discrete

Question 28

Identify the kind of variable in this situation:

price of gasoline per gallon throughout American history

Accepted Answer

continuous

Answer

nominal

Answer

ordinal

Answer

discrete

Question 29

Identify the kind of variable in this situation:

number of paper clips in mason jar on Mr. Rhoades' desk

Accepted Answer

discrete

Answer

nominal

Answer

ordinal

Answer

continuous

Question 30

Identify the kind of variable in this situation:

number of chairs in room 201

Accepted Answer

discrete

Answer

nominal

Answer

ordinal

Answer

continuous

Question 31

The number of defective computers produced by a manufacturer

Accepted Answer

Discrete Random Variable

Answer

Continuous Random Variable

Question 32

Distance of towns in the Province from the Capital City

Accepted Answer

Continuous Random Variable

Answer

Discrete Random Variable

Question 33

Books in a library

Accepted Answer

Discrete Random Variable

Answer

Continuous Random Variable

Question 34

Heights of Basketball Players

Accepted Answer

Continuous Random Variable

Answer

Discrete Random Variable

Question 35

Is this a probability distribution?

Accepted Answer

No

Answer

Yes

Question 36

Is this a probability distribution?

Accepted Answer

Yes

Answer

No

Question 37

Find the mean of the probability distribution.

Accepted Answer

84.4

Answer

85

Answer

83.2

Answer

87.1

Question 38

A random variable is

Accepted Answer

a variable whose value is a numerical outcome associated with a random phenomenon.

Answer

a hypothetical list of the possible outcomes of a random phenomenon.

Answer

any phenomenon in which outcomes are equally likely.

Answer

any number that changes in a predictable way in the long run.

Question 39

Which of the following random variables is NOT continuous?

Accepted Answer

Number of goals scored by a hockey team.

Answer

Amount of gasoline in a car.

Answer

Time it takes to commute to work.

Answer

Lifetime of a AAA battery.

Question 40

Which one of the following is discrete data?

Accepted Answer

Sam has two brothers and one sister

Answer

Sam is 160 cm tall

Answer

Sam weighs 60 lbs.

Answer

Sam ran 100 meters in 10.2 seconds

Question 41

The time it takes for a car battery to die.

Accepted Answer

Continuous

Answer

Discrete

Question 42

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

Accepted Answer

Continuous

Answer

Discrete

Question 43

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

Accepted Answer

Continuous

Answer

Discrete

Question 44

In continuous functions, the x-values...

Accepted Answer

Can be all numbers

Answer

Can only be whole numbers

Answer

Can only be decimals

Question 45

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

Accepted Answer

Continuous

Answer

Discrete

Question 46

The number of school lunches sold during the month.

Accepted Answer

Discrete

Answer

Continuous

Mean of Discrete Random Variable

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