· 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 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 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 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 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 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 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 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 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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