Question 1

Two events A and B are said to be independent if P(A|B) = P(B).

Accepted Answer

A) True 
 B)False

Question 2

The relative frequency approach to probability uses long term frequencies, often based on past data.

Accepted Answer

A) True 
 B)False

Question 3

A(n) ____________________ of a random experiment is a list of all possible outcomes of the experiment.

Accepted Answer

The answer of A(n) ____________________ of a random experiment is...

Question 4

Two events A and B are said to be mutually exclusive if P(A and B) = 1.0.

Accepted Answer

A) True 
 B)False

Question 5

If an experiment consists of five outcomes with P(O1) = 0.10, P(O2) = 0.20, P(O3) = 0.30, P(O4) = 0.25, then P(O5) is

Accepted Answer

A) 0.75 
B) 0.15 
C) 0.50 
D) Cannot be determined from the information given. 
A) 0.75 
B) 0.15 
C) 0.50 
D) Cannot be determined from the information given.

Question 6

NARRBEGIN: Cysts
Cysts
After researching cysts of a particular type, a doctor learns that out of 10,000 such cysts examined, 1,500 are malignant and 8,500 are benign. A diagnostic test is available which is accurate 80% of the time (whether the cyst is malignant or not). The doctor has discovered the same type of cyst in a patient.NARREND
-{Cysts Narrative} In the absence of any test, what is the probability that the cyst is benign?

Accepted Answer

B = Benign

Question 7

Conditional probabilities are also called likelihood probabilities.

Accepted Answer

A) True 
 B)False

Question 8

NARRBEGIN: College Professorship
College Professorship
A Ph.D. graduate has applied for a job with two colleges: A and B. The graduate feels that she has a 60% chance of receiving an offer from college A and a 50% chance of receiving an offer from college B. If she receives an offer from college B, she believes that she has an 80% chance of receiving an offer from college A. Let A = receiving an offer from college A, and let B = receiving an offer from college B.NARREND
-Is it possible to have two events for which P(A) = 0.40, P(B) = 0.50, and P(A or B) = 0.30? Explain.

Accepted Answer

Yes. In this situati

Question 9

If two events are collectively exhaustive, what is the probability that one or the other occurs?

Accepted Answer

A) 0.00 
B) 0.50 
C) 1.00 
D) Cannot be determined from the information given. 
A) 0.00 
B) 0.50 
C) 1.00 
D) Cannot be determined from the information given.

Question 10

NARRBEGIN: Drunk Drivers
Drunk Drivers
Five hundred accidents that occurred on a Saturday night were analyzed. Two items noted were the number of vehicles involved and whether alcohol played a role in the accident. The numbers are shown below:
 $$\begin{array}{l}
\text { number of Vehieles inovelved }\
\begin{array} { | l | c c c | c | } 
\hline \text { Did alohol play a role? } & 1 & 2 & 3 & \text { Totals } \
\hline \text { Yes } & 75 & 125 & 50 & 250 \
\text { No } & 50 & 225 & 75 & 350 \
\hline \text { Totals } & 125 & 350 & 125 & 600 \
\hline
\end{array}
\end{array}$$ NARREND
-{Drunk Drivers Narrative} What proportion of accidents involved alcohol or a single vehicle?

Accepted Answer

The answer of NARRBEGIN: Drunk Drivers
Drunk Drivers
Five hundred accidents that...

Question 11

NARRBEGIN: Marital Status
Marital Status
An insurance company has collected the following data on the gender and marital status of 600 customers. $$\begin{array}{l}
\quad\quad\quad\quad\quad\quad\quad\quad\quad\text { Marital Status }\
\begin{array} { | l | c c c | } 
\hline \text { Gender } & \text { Single } & \text { Maried } & \text { Divorced } \
\hline \text { Male } & 50 & 250 & 30 \
\text { Female } & 100 & 100 & 40 \
\hline
\end{array}
\end{array}$$ Suppose that a customer is selected at random.NARREND
-{Marital Status Narrative} Find the probability that the customer selected is a married female.

Accepted Answer

The answer of NARRBEGIN: Marital Status
Marital Status
An insurance company has...

Question 12

Suppose we have two events A and B. We can apply the addition rule to compute the probability that at least one of these events occurs.

Accepted Answer

A) True 
 B)False

Question 13

If A and B are independent events with P(A) = 0.60 and P(A|B) = 0.60, then P(B) is:

Accepted Answer

A) 1.20 
B) 0.60 
C) 0.36 
D) cannot be determined with the information given 
A) 1.20 
B) 0.60 
C) 0.36 
D) cannot be determined with the information given

Question 14

NARRBEGIN: Tea and Seltzer
Tea and Seltzer
Suppose 55 percent of adults drink tea, 45 percent drink seltzer, and 10 percent drink both.NARREND
-{Tea and Seltzer Narrative} What is the probability that a randomly chosen adult drinks seltzer or tea or both?

Accepted Answer

The answer of NARRBEGIN: Tea and Seltzer
Tea and Seltzer
Suppose 55...

Question 15

A random experiment is an action or process that leads to one of several possible ____________________.

Accepted Answer

The answer of A random experiment is an action or...

Question 16

The probability of an event is the ____________________ of the probabilities of the simple events that constitute the event.

Accepted Answer

The answer of The probability of an event is the...

Question 17

NARRBEGIN: Drunk Drivers
Drunk Drivers
Five hundred accidents that occurred on a Saturday night were analyzed. Two items noted were the number of vehicles involved and whether alcohol played a role in the accident. The numbers are shown below:
 $$\begin{array}{l}
\text { number of Vehieles inovelved }\
\begin{array} { | l | c c c | c | } 
\hline \text { Did alohol play a role? } & 1 & 2 & 3 & \text { Totals } \
\hline \text { Yes } & 75 & 125 & 50 & 250 \
\text { No } & 50 & 225 & 75 & 350 \
\hline \text { Totals } & 125 & 350 & 125 & 600 \
\hline
\end{array}
\end{array}$$ NARREND
-{Drunk Drivers Narrative} If 3 vehicles were involved, what proportion of accidents involved alcohol?

Accepted Answer

The answer of NARRBEGIN: Drunk Drivers
Drunk Drivers
Five hundred accidents that...

Question 18

Bayes' Law is used to compute:

Accepted Answer

A) prior probabilities. 
B) joint probabilities. 
C) union probabilities. 
D) posterior probabilities. 
A) prior probabilities. 
B) joint probabilities. 
C) union probabilities. 
D) posterior probabilities.

Question 19

If A and B are any two events with P(A) = .8 and P(B|A) = .4, then P(A and B) is:

Accepted Answer

A) .40 
B) .32 
C) 1.20 
D) None of these choices. 
A) .40 
B) .32 
C) 1.20 
D) None of these choices.

Question 20

If A and B are independent events with P(A) = 0.20 and P(B) = 0.60, then P(A|B) is:

Accepted Answer

A) 0.20 
B) 0.60 
C) 0.40 
D) 0.80 
A) 0.20 
B) 0.60 
C) 0.40 
D) 0.80

Two events A and B are said to be independent if P(A|B) = P(B).

The relative frequency approach to probability uses long term frequencies, often based on past data.

A(n) ____________________ of a random experiment is a list of all possible outcomes of the experiment.

Two events A and B are said to be mutually exclusive if P(A and B) = 1.0.

If an experiment consists of five outcomes with P(O₁) = 0.10, P(O₂) = 0.20, P(O₃) = 0.30, P(O₄) = 0.25, then P(O₅) is

Conditional probabilities are also called likelihood probabilities.

If two events are collectively exhaustive, what is the probability that one or the other occurs?

Suppose we have two events A and B. We can apply the addition rule to compute the probability that at least one of these events occurs.

If A and B are independent events with P(A) = 0.60 and P(A|B) = 0.60, then P(B) is:

NARRBEGIN: Tea and Seltzer Tea and Seltzer Suppose 55 percent of adults drink tea, 45 percent drink seltzer, and 10 percent drink both.NARREND -{Tea and Seltzer Narrative} What is the probability that a randomly chosen adult drinks seltzer or tea or both?

A random experiment is an action or process that leads to one of several possible ____________________.

The probability of an event is the ____________________ of the probabilities of the simple events that constitute the event.

Bayes' Law is used to compute:

If A and B are any two events with P(A) = .8 and P(B|A) = .4, then P(A and B) is:

If A and B are independent events with P(A) = 0.20 and P(B) = 0.60, then P(A|B) is:

What Is Statistics

Graphical Descriptive Techniques I

Graphical Descriptive Techniques II

Numerical Descriptive Techniques

Data Collection and Sampling

Random Variables and Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions

Introduction to Estimation

Introduction to Hypothesis Testing

Inference About a Population

Inference About Comparing Two Populations

Analysis of Variance

Chi-Squared Tests Optional

Simple Linear Regression and Correlation

Multiple Regression

Filters

Exam 6: Probability

Two events A and B are said to be independent if P(A|B) = P(B).

The relative frequency approach to probability uses long term frequencies, often based on past data.

A(n) ____________________ of a random experiment is a list of all possible outcomes of the experiment.

Two events A and B are said to be mutually exclusive if P(A and B) = 1.0.

If an experiment consists of five outcomes with P(O1) = 0.10, P(O2) = 0.20, P(O3) = 0.30, P(O4) = 0.25, then P(O5) is

Conditional probabilities are also called likelihood probabilities.

If two events are collectively exhaustive, what is the probability that one or the other occurs?

Suppose we have two events A and B. We can apply the addition rule to compute the probability that at least one of these events occurs.

If A and B are independent events with P(A) = 0.60 and P(A|B) = 0.60, then P(B) is:

NARRBEGIN: Tea and Seltzer Tea and Seltzer Suppose 55 percent of adults drink tea, 45 percent drink seltzer, and 10 percent drink both.NARREND -{Tea and Seltzer Narrative} What is the probability that a randomly chosen adult drinks seltzer or tea or both?

A random experiment is an action or process that leads to one of several possible ____________________.

The probability of an event is the ____________________ of the probabilities of the simple events that constitute the event.

Bayes' Law is used to compute:

If A and B are any two events with P(A) = .8 and P(B|A) = .4, then P(A and B) is:

If A and B are independent events with P(A) = 0.20 and P(B) = 0.60, then P(A|B) is:

What Is Statistics

Graphical Descriptive Techniques I

Graphical Descriptive Techniques II

Numerical Descriptive Techniques

Data Collection and Sampling

Random Variables and Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions

Introduction to Estimation

Introduction to Hypothesis Testing

Inference About a Population

Inference About Comparing Two Populations

Analysis of Variance

Chi-Squared Tests Optional

Simple Linear Regression and Correlation

Multiple Regression

Filters

If an experiment consists of five outcomes with P(O₁) = 0.10, P(O₂) = 0.20, P(O₃) = 0.30, P(O₄) = 0.25, then P(O₅) is