Question 1

A true-false test consists of six questions. If you guess the answer to each question, what is the probability of getting all six questions correct?

Accepted Answer

A)  0 
B)  0.016 
C)  0.062 
D)  0.250 
E)  None of the choices are correct 
A)  0 
B)  0.016 
C)  0.062 
D)  0.250 
E)  None of the choices are correct

Question 2

David's gasoline station offers 4 cents off per litre if the customer pays in cash and does not use a credit card. Past evidence indicates that 40% of all customers pay in cash. During a one-hour period twenty-five customers buy gasoline at this station.
What is the probability that at least ten pay in cash?

Accepted Answer

A)  0.416 
B)  0.575 
C)  0.586 
D)  0.425 
E)  None of the choices are correct 
A)  0.416 
B)  0.575 
C)  0.586 
D)  0.425 
E)  None of the choices are correct

Question 3

If ? = 1/3 and n = 900, the mean of this binomial distribution is ______.

Accepted Answer

The answer of If ? = 1/3 and n =...

Question 4

The binomial distribution and the Poisson distribution have ________possible experimental
outcomes.

Accepted Answer

The answer of The binomial distribution and the Poisson distribution...

Question 5

If your college hires the next four employees without regard to gender, and the pool of applicants is large with an equal number of men and women, then the probability distribution for the number x of women hired is described in the accompanying table.   The mean of the probability distribution = ______and its standard deviation =______ .

Accepted Answer

The answer of If your college hires the next four...

Question 6

An insurance agent has appointments with four prospective clients tomorrow. From past experience the agent knows that the probability of making a sale on any appointment is 1 out of 5. Using the rules of probability, what is the likelihood that the agent will sell a policy to at least 3 of the 4 prospective clients?

Accepted Answer

A)  0.0016 
B)  0.4096 
C)  0.0272 
D)  0.0256 
E)  None of the choices are correct 
A)  0.0016 
B)  0.4096 
C)  0.0272 
D)  0.0256 
E)  None of the choices are correct

Question 7

When surveyed for brand recognition, 98% of consumers recognize Coke. A new survey of 800 randomly selected consumers is to be conducted. For such a group of 800, determine the mean and standard deviation for the number who recognize the Coke brand name. Considering as unusual a result that differs from the mean by more than two standard deviations, it ( (is/is not) ) unusual to get 775 consumers who recognize the Coke brand name.

Accepted Answer

A)  16, 3.96, is not 
B)  16, 16, is 
C)  784, 3.96, is 
D)  874, 16, is not 
E)  None of the choices are correct 
A)  16, 3.96, is not 
B)  16, 16, is 
C)  784, 3.96, is 
D)  874, 16, is not 
E)  None of the choices are correct

Question 8

A binomial probability distribution approaches a greater degree of symmetry as probability of success remains constant and the number of trials becomes_______ .

Accepted Answer

The answer of A binomial probability distribution approaches a greater...

Question 9

David's gasoline station offers 4 cents off per litre if the customer pays in cash and does not use a credit card. Past evidence indicates that 40% of all customers pay in cash. During a one-hour period twenty-five customers buy gasoline at this station.
What is the probability that no more than twenty pay in cash?

Accepted Answer

A)  0.0 
B)  0.1 
C)  0.9 
D)  1.0 
E)  None of the choices are correct 
A)  0.0 
B)  0.1 
C)  0.9 
D)  1.0 
E)  None of the choices are correct

Question 10

A marketing solutions poll of mutual funds and fund owners asked fund owners what action they took after the September 11th 2001 market drop. Sixteen percent of respondents said they bought more funds. If 600 fund owners were polled, the mean of the number of respondents who bought more
funds =______ , and the standard deviation =______ . Considering as unusual a result that differs from the mean by more than two standard deviations, it ( (is/is not) ) unusual that in one of these polls of 600 fund owners, 100 respondents bought more mutual funds.

Accepted Answer

The answer of A marketing solutions poll of mutual funds...

Question 11

Elly's hot dog emporium is famous for its chilidogs. Some customers order the hot dogs with hot peppers, while many do not care for that added bit of zest. Elly's latest sales indicate that 30% of the customers ordering her chilidogs order it with hot peppers. Suppose 18 customers are selected at random.
What is the probability that exactly ten customers will ask for hot peppers?

Accepted Answer

A)  0.015 
B)  0.15 
C)  0.708 
D)  0.00 
E)  None of the choices are correct 
A)  0.015 
B)  0.15 
C)  0.708 
D)  0.00 
E)  None of the choices are correct

Question 12

What kind of distribution are the binomial and Poisson distributions?

Accepted Answer

A)  Discrete 
B)  Continuous 
C)  Both discrete and continuous 
D)  Neither discrete or continuous 
A)  Discrete 
B)  Continuous 
C)  Both discrete and continuous 
D)  Neither discrete or continuous

Question 13

If n = 900 and ? = 1/3, the variance of this binomial distribution is ______.

Accepted Answer

The answer of If n = 900 and ? =...

Question 14

A statistic professor finds she averages five e-mail messages per day from students. Assume the number of messages approximates a Poisson distribution.
What is the probability that on a randomly selected day she will have five messages?

Accepted Answer

A)  0.0067 
B)  0.875 
C)  0.175 
D)  1.0 
E)  None of the choices are correct 
A)  0.0067 
B)  0.875 
C)  0.175 
D)  1.0 
E)  None of the choices are correct

Question 15

An insurance agent has appointments with four prospective clients tomorrow. From past experience the agent knows that the probability of making a sale on any appointment is 1 out of 5. Using the rules of probability, what is the likelihood that the agent will sell a policy to 3 of the 4 prospective clients?

Accepted Answer

A)  0.250 
B)  0.500 
C)  0.410 
D)  0.026 
E)  None of the choices are correct 
A)  0.250 
B)  0.500 
C)  0.410 
D)  0.026 
E)  None of the choices are correct

Question 16

David's gasoline station offers 4 cents off per litre if the customer pays in cash and does not use a credit card. Past evidence indicates that 40% of all customers pay in cash. During a one-hour period twenty-five customers buy gasoline at this station. This situation is an example of what type of discrete probability distribution?

Accepted Answer

A)  Continuous probability distribution 
B)  Poisson probability distribution 
C)  Binomial probability distribution 
D)  Hypergeometric probability distribution 
A)  Continuous probability distribution 
B)  Poisson probability distribution 
C)  Binomial probability distribution 
D)  Hypergeometric probability distribution

Question 17

Let X represent the number of children in a Canadian household. The probability distribution of X is as follows:   The probability that a randomly selected Canadian household will have more than 3 children is_____ . The expected number of children in a randomly selected Canadian household is______ .

Accepted Answer

The answer of Let X represent the number of children...

Question 18

What is a listing of all possible outcomes of an experiment and their corresponding probability of occurrence called?

Accepted Answer

A)  Random variable 
B)  Probability distribution 
C)  Subjective probability 
D)  Frequency distribution 
E)  None of the choices are correct 
A)  Random variable 
B)  Probability distribution 
C)  Subjective probability 
D)  Frequency distribution 
E)  None of the choices are correct

Question 19

A company is studying the number of monthly absences among its 125 employees. The following probability distribution shows the likelihood that people were absent 0, 1, 2, 3, 4, or 5 days last month.   What is the mean number of days absent?

Accepted Answer

A)  1.00 
B)  0.40 
C)  0.72 
D)  2.5 
A)  1.00 
B)  0.40 
C)  0.72 
D)  2.5

Question 20

A(n) _____population consists of a fixed number of individuals, objects, or measurements.

Accepted Answer

The answer of A(n) _____population consists of a fixed number...

A true-false test consists of six questions. If you guess the answer to each question, what is the probability of getting all six questions correct?

If ? = 1/3 and n = 900, the mean of this binomial distribution is ______.

The binomial distribution and the Poisson distribution have ________possible experimental outcomes.

A binomial probability distribution approaches a greater degree of symmetry as probability of success remains constant and the number of trials becomes_______ .

What kind of distribution are the binomial and Poisson distributions?

If n = 900 and ? = 1/3, the variance of this binomial distribution is ______.

A statistic professor finds she averages five e-mail messages per day from students. Assume the number of messages approximates a Poisson distribution. What is the probability that on a randomly selected day she will have five messages?

Let X represent the number of children in a Canadian household. The probability distribution of X is as follows: The probability that a randomly selected Canadian household will have more than 3 children is_ . The expected number of children in a randomly selected Canadian household is__ .

What is a listing of all possible outcomes of an experiment and their corresponding probability of occurrence called?

A company is studying the number of monthly absences among its 125 employees. The following probability distribution shows the likelihood that people were absent 0, 1, 2, 3, 4, or 5 days last month. What is the mean number of days absent?

A(n) _____population consists of a fixed number of individuals, objects, or measurements.

What Is Statistics

Describing Data: Frequency Distributions and Graphic Presentation

Describing Data: Numerical Measures

A Survey of Probability Concepts

The Normal Probability Distribution

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of a Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Linear Regression and Correlation

Multiple Regression and Correlation Analysis

Chi-Square Applications for Nominal Data

Index Numbers

Time Series and Forecasting

An Introduction to Decision Theory

Filters

Exam 5: Discrete Probability Distributions

A true-false test consists of six questions. If you guess the answer to each question, what is the probability of getting all six questions correct?

If ? = 1/3 and n = 900, the mean of this binomial distribution is ______.

The binomial distribution and the Poisson distribution have ________possible experimental outcomes.

A binomial probability distribution approaches a greater degree of symmetry as probability of success remains constant and the number of trials becomes_______ .

What kind of distribution are the binomial and Poisson distributions?

If n = 900 and ? = 1/3, the variance of this binomial distribution is ______.

A statistic professor finds she averages five e-mail messages per day from students. Assume the number of messages approximates a Poisson distribution. What is the probability that on a randomly selected day she will have five messages?

Let X represent the number of children in a Canadian household. The probability distribution of X is as follows: The probability that a randomly selected Canadian household will have more than 3 children is_____ . The expected number of children in a randomly selected Canadian household is______ .

What is a listing of all possible outcomes of an experiment and their corresponding probability of occurrence called?

A company is studying the number of monthly absences among its 125 employees. The following probability distribution shows the likelihood that people were absent 0, 1, 2, 3, 4, or 5 days last month. What is the mean number of days absent?

A(n) _____population consists of a fixed number of individuals, objects, or measurements.

What Is Statistics

Describing Data: Frequency Distributions and Graphic Presentation

Describing Data: Numerical Measures

A Survey of Probability Concepts

The Normal Probability Distribution

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of a Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Linear Regression and Correlation

Multiple Regression and Correlation Analysis

Chi-Square Applications for Nominal Data

Index Numbers

Time Series and Forecasting

An Introduction to Decision Theory

Filters

Let X represent the number of children in a Canadian household. The probability distribution of X is as follows: The probability that a randomly selected Canadian household will have more than 3 children is_ . The expected number of children in a randomly selected Canadian household is__ .