# Question 1 4 out of 4 points Continuous random variables are obtained from data that can be measured rather than counted.

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·         Question 1

4 out of 4 points

Continuous random variables are obtained from data that can be measured rather than counted.

·         Question 2

4 out of 4 points

The sum of the probabilities of all the events in the sample space of a probability distribution must equal 1.

·         Question 3

4 out of 4 points

Discrete variables have values that can be measured.

·         Question 4

4 out of 4 points

The following distribution is not a probability distribution because

X

2

1

0

1

2

P(X)

0.16

0.20

–0.12

0.45

0.31

·         Question 5

4 out of 4 points

The following distribution is not a probability distribution because

X

2

1

0

1

2

P(X)

0.08

0.21

0.43

0.17

0.26

·         Question 6

4 out of 4 points

A(n) __________ probability distribution consists of the finite number of values a random variable can assume and the corresponding probabilities of the values.

·         Question 7

4 out of 4 points

A(n) __________ variable is one in which values are determined by chance.

·         Question 8

4 out of 4 points

Find the mean of the distribution shown below.

X

2

3

4

P(X)

0.35

0.24

0.41

·         Question 9

4 out of 4 points

Find the mean of the distribution shown below.

X

2

3

4

P(X)

0.36

0.40

0.24

·         Question 10

Find the mean of the distribution shown.

X

1

2

P(X)

0.32

0.68

Give the variance of the following distribution?

X

0

1

2

3

4

P(X)

0.20

0.35

0.10

0.25

0.10

The number of cartoons watched on Saturday mornings by students in Mrs. Kelly’s first grade class is shown below.

Number of cartoons watched X

0

1

2

3

4

5

Probability P(X)

0.15

0.20

0.30

0.10

0.20

0.05

What is the mean of the data?

·         Question 13

4 out of 4 points

What is the standard deviation of the following probability distribution?

X

0

2

4

6

8

P(X)

0.20

0.05

0.35

0.25

0.15

·         Question 14

0 out of 4 points

A pet supplier has a stock of parakeets of which 20% are blue parakeets. A pet store orders 3 parakeets from this supplier. If the supplier selects the parakeets at random, what is the chance that the pet store gets exactly one blue parakeet?

·         Question 15

4 out of 4 points

A coin is tossed 72 times. Find the standard deviation for the number of heads that will be tossed.

·         Question 16

4 out of 4 points

A university has 10,000 students of which 35% are male and 65% are female. If a class of 30 students is chosen at random from the university population, find the mean and variance of the number of male students.

·         Question 17

4 out of 4 points

In a large bag of marbles, 20% of them are red. A child chooses 4 marbles from this bag. If the child chooses the marbles at random, what is the chance that the child gets exactly three red marbles?

·         Question 18

4 out of 4 points

A surgical technique is performed on ten patients. You are told there is 70% chance of success. Find the probability that the surgery is successful for exactly 8 patients.

·         Question 19

0 out of 4 points

A surgical technique is performed on nine patients. You are told there is 70% chance of success. Find the probability that the surgery is successful for exactly 5 patients.

·         Question 20

4 out of 4 points

A surgical technique is performed on ten patients. You are told there is 90% chance of success. Find the probability that the surgery is successful for at least 8 patients

·         Question 21

0 out of 4 points

A surgical technique is performed on eight patients. You are told there is 70% chance of success. Find the probability that the surgery is successful for at least 6 patients

·         Question 22

0 out of 4 points

If a student randomly guesses at 15 multiple-choice Questions, find the probability that the student gets exactly five correct. Each Question has five possible choices.

·         Question 23

0 out of 4 points

If a student randomly guesses at 10 multiple-choice Questions, find the probability that the student gets exactly five correct. Each Question has four possible choices.

·         Question 24

4 out of 4 points

Find the mean and the standard deviation of a Binomial Distribution with n= 30 and p= 0.56

·         Question 25

4 out of 4 points

Find the mean and the standard deviation of a Binomial Distribution with n= 64 and p= 0.85

·         Question 1

4 out of 4 points

The following distribution is not a probability distribution because

X

2

1

0

1

2

P(X)

0.08

0.21

0.43

0.17

0.26

·         Question 2

4 out of 4 points

A(n) __________ probability distribution consists of the finite number of values a random variable can assume and the corresponding probabilities of the values.

·         Question 3

4 out of 4 points

A(n) __________ variable is one in which values are determined by chance.

·         Question 4

4 out of 4 points

Continuous random variables are obtained from data that can be measured rather than counted.

·         Question 5

4 out of 4 points

Discrete variables have values that can be measured.

·         Question 6

4 out of 4 points

The sum of the probabilities of all the events in the sample space of a probability distribution must equal 1.

·         Question 7

4 out of 4 points

The following distribution is not a probability distribution because

X

2

1

0

1

2

P(X)

0.16

0.20

–0.12

0.45

0.31

·         Question 8

4 out of 4 points

Find the mean of the distribution shown.

X

1

2

P(X)

0.32

0.68

Find the mean of the distribution shown below.

X

2

3

4

P(X)

0.36

0.40

0.24

·         Question 10

4 out of 4 points

What is the standard deviation of the following probability distribution?

X

0

2

4

6

8

P(X)

0.20

0.05

0.35

0.25

0.15

·         Question 11

4 out of 4 points

The number of cartoons watched on Saturday mornings by students in Mrs. Kelly’s first grade class is shown below.

Number of cartoons watched    X

0

1

2

3

4

5

Probability   P(X)

0.15

0.20

0.30

0.10

0.20

0.05

What is the mean of the data?

·         Question 12

4 out of 4 points

Give the variance of the following distribution?

X

0

1

2

3

4

P(X)

0.20

0.35

0.10

0.25

0.10

·         Question 13

4 out of 4 points

Find the mean of the distribution shown below.

X

2

3

4

P(X)

0.35

0.24

0.41

·         Question 14

4 out of 4 points

A coin is tossed 72 times. Find the standard deviation for the number of heads that will be tossed.

·         Question 15

0 out of 4 points

A jewelry supplier has a supply of earrings which are 40% platinum. A store owner orders five sets of earrings from the supplier. If the supplier selects the pairs of earrings at random, what is the chance that the jewelry store gets exactly two sets of platinum pairs?

·         Question 16

0 out of 4 points

A coin is tossed five times. Find the probability of getting exactly three heads.

·         Question 17

4 out of 4 points

A student takes a 6 Question multiple choice quiz with 4 choices for each Question. If the student guesses at random on each Question, what is the probability that the student gets exactly 4 Questions correct?

·         Question 18

0 out of 4 points

A surgical technique is performed on seven patients. You are told there is 70% chance of success. Find the probability that the surgery is successful for exactly 5 patients.

·         Question 19

0 out of 4 points

A surgical technique is performed on eight patients. You are told there is 70% chance of success. Find the probability that the surgery is successful for exactly 6 patients.

·         Question 20

4 out of 4 points

A surgical technique is performed on ten patients. You are told there is 85% chance of success. Find the probability that the surgery is successful for at least 8 patients

·         Question 21

4 out of 4 points

A surgical technique is performed on seven patients. You are told there is 70% chance of success. Find the probability that the surgery is successful for at least 5 patients

·         Question 22

4 out of 4 points

If a student randomly guesses at 15 multiple-choice Questions, find the probability that the student gets exactly five correct. Each Question has five possible choices.

·         Question 23

4 out of 4 points

If a student randomly guesses at 10 multiple-choice Questions, find the probability that the student gets exactly five correct. Each Question has four possible choices.

·         Question 24

4 out of 4 points

Find the mean and the standard deviation of a Binomial Distribution with n= 30 and p= 0.56

·         Question 25

4 out of 4 points

Find the mean and the standard deviation of a Binomial Distribution with n= 124 and p= 0.26

·  Question 1

4 out of 4 points

Continuous random variables are obtained from data that can be measured rather than counted.

·  Question 2

4 out of 4 points

The following distribution is not a probability distribution because

X

2

1

0

1

2

P(X)

0.16

0.20

–0.12

0.45

0.31

·  Question 3

4 out of 4 points

The following distribution is not a probability distribution because

X

2

1

0

1

2

P(X)

0.08

0.21

0.43

0.17

0.26

·  Question 4

4 out of 4 points

The sum of the probabilities of all the events in the sample space of a probability distribution must equal 1.

·  Question 5

4 out of 4 points

A(n) __________ probability distribution consists of the finite number of values a random variable can assume and the corresponding probabilities of the values.

·  Question 6

4 out of 4 points

A(n) __________ variable is one in which values are determined by chance.

·  Question 7

4 out of 4 points

Discrete variables have values that can be measured.

·  Question 8

4 out of 4 points

Find the mean of the distribution shown below.

X

2

3

4

P(X)

0.36

0.40

0.24

·  Question 9

4 out of 4 points

The number of cartoons watched on Saturday mornings by students in Mrs. Kelly’s first grade class is shown below.

Number of cartoons watched    X

0

1

2

3

4

5

Probability   P(X)

0.15

0.20

0.30

0.10

0.20

0.05

What is the mean of the data?

·  Question 10

4 out of 4 points

Find the mean of the distribution shown below.

X

2

3

4

P(X)

0.35

0.24

0.41

·  Question 11

4 out of 4 points

What is the standard deviation of the following probability distribution?

X

0

2

4

6

8

P(X)

0.20

0.05

0.35

0.25

0.15

·  Question 12

4 out of 4 points

Find the mean of the distribution shown.

X

1

2

P(X)

0.32

0.68

·  Question 13

4 out of 4 points

Find the mean of the distribution shown.

X

4

6

P(X)

0.36

0.64

·  Question 14

4 out of 4 points

A university has 10,000 students of which 35% are male and 65% are female. If a class of 30 students is chosen at random from the university population, find the mean and variance of the number of male students.

·  Question 15

4 out of 4 points

A student takes a 6 Question multiple choice quiz with 4 choices for each Question. If the student guesses at random on each Question, what is the probability that the student gets exactly 4 Questions correct?

·  Question 16

4 out of 4 points

In binomial experiments, each trial can be viewed as having only two outcomes.

·  Question 17

0 out of 4 points

A computer store has 75 printers of which 20 are laser printers and 55 are ink jet printers. If a group of 10 printers is chosen at random from the store, find the mean and variance of the number of ink jet printers.

·  Question 18

4 out of 4 points

A surgical technique is performed on seven patients. You are told there is 70% chance of success. Find the probability that the surgery is successful for exactly 5 patients.

·  Question 19

4 out of 4 points

A surgical technique is performed on eight patients. You are told there is 70% chance of success. Find the probability that the surgery is successful for exactly 6 patients.

·  Question 20

4 out of 4 points

A surgical technique is performed on eight patients. You are told there is 70% chance of success. Find the probability that the surgery is successful for at least 6 patients

·  Question 21

4 out of 4 points

A surgical technique is performed on ten patients. You are told there is 90% chance of success. Find the probability that the surgery is successful for at least 8 patients

·  Question 22

4 out of 4 points

If a student randomly guesses at 15 multiple-choice Questions, find the probability that the student gets exactly five correct. Each Question has five possible choices.

·  Question 23

4 out of 4 points

If a student randomly guesses at 15 multiple-choice Questions, find the probability that the student gets exactly four correct. Each Question has four possible choices.

·  Question 24

4 out of 4 points

Find the mean and the standard deviation of a Binomial Distribution with n= 64 and p= 0.85

·  Question 25

4 out of 4 points

Find the mean and the standard deviation of a Binomial Distribution with n= 80 and p= 0.3

·  4 out of 4 points

A(n) __________ probability distribution consists of the finite number of values a random variable can assume and the corresponding probabilities of the values.

·  Question 2

4 out of 4 points

Continuous random variables are obtained from data that can be measured rather than counted.

·  Question 3

4 out of 4 points

A(n) __________ variable is one in which values are determined by chance.

·  Question 4

4 out of 4 points

The sum of the probabilities of all the events in the sample space of a probability distribution must equal 1.

·  Question 5

4 out of 4 points

The following distribution is not a probability distribution because

X

2

1

0

1

2

P(X)

0.08

0.21

0.43

0.17

0.26

·  Question 6

4 out of 4 points

Discrete variables have values that can be measured.

·  Question 7

4 out of 4 points

The following distribution is not a probability distribution because

X

2

1

0

1

2

P(X)

0.16

0.20

–0.12

0.45

0.31

·  Question 8

4 out of 4 points

Find the mean of the distribution shown.

X

1

2

P(X)

0.32

0.68

·  Question 9

4 out of 4 points

Give the variance of the following distribution?

X

0

1

2

3

4

P(X)

0.20

0.35

0.10

0.25

0.10

·  Question 10

4 out of 4 points

What is the standard deviation of the following probability distribution?

X

0

2

4

6

8

P(X)

0.20

0.05

0.35

0.25

0.15

·  Question 11

4 out of 4 points

Find the mean of the distribution shown below.

X

2

3

4

P(X)

0.36

0.40

0.24

·  Question 12

4 out of 4 points

The number of cartoons watched on Saturday mornings by students in Mrs. Kelly’s first grade class is shown below.

Number of cartoons watched    X

0

1

2

3

4

5

Probability   P(X)

0.15

0.20

0.30

0.10

0.20

0.05

What is the mean of the data?

·  Question 13

4 out of 4 points

Find the mean of the distribution shown.

X

4

6

P(X)

0.36

0.64

·  Question 14

4 out of 4 points

A coin is tossed 72 times. Find the standard deviation for the number of heads that will be tossed.

·  Question 15

4 out of 4 points

A coin is tossed five times. Find the probability of getting exactly three heads.

·  Question 16

4 out of 4 points

A jewelry supplier has a supply of earrings which are 40% platinum. A store owner orders five sets of earrings from the supplier. If the supplier selects the pairs of earrings at random, what is the chance that the jewelry store gets exactly two sets of platinum pairs?

·  Question 17

4 out of 4 points

The probability of a success remains the same for each trial in a binomial experiment.

·  Question 18

4 out of 4 points

A surgical technique is performed on twelve patients. You are told there is 70% chance of success. Find the probability that the surgery is successful for exactly 9 patients.

·  Question 19

4 out of 4 points

A surgical technique is performed on nine patients. You are told there is 70% chance of success. Find the probability that the surgery is successful for exactly 5 patients.

·  Question 20

0 out of 4 points

A surgical technique is performed on nine patients. You are told there is 80% chance of success. Find the probability that the surgery is successful for at least 8 patients

·  Question 21

4 out of 4 points

A surgical technique is performed on eight patients. You are told there is 70% chance of success. Find the probability that the surgery is successful for at least 6 patients

·  Question 22

4 out of 4 points

If a student randomly guesses at 10 multiple-choice Questions, find the probability that the student gets exactly five correct. Each Question has four possible choices.

·  Question 23

0 out of 4 points

If a student randomly guesses at 12 multiple-choice Questions, find the probability that the student gets exactly seven correct. Each Question has five possible choices.

·  Question 24

4 out of 4 points

Find the mean and the standard deviation of a Binomial Distribution with n= 30 and p= 0.56

·  Question 25

4 out of 4 points

Find the mean and the standard deviation of a Binomial Distribution with n= 124 and p= 0.26

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