Question 1

The range of probability is

Accepted Answer

A) any value larger than zero 
B) any value between minus infinity to plus infinity 
C) zero to one 
D) any value between -1 to 1 
A) any value larger than zero 
B) any value between minus infinity to plus infinity 
C) zero to one 
D) any value between -1 to 1

Question 2

A student has to take 9 more courses before he can graduate.If none of the courses are prerequisite to others,how many groups of four courses can he select for the next semester?

Accepted Answer

The answer of A student has to take 9 more...

Question 3

If A and B are independent events with P(A)= 0.2 and P(B)= 0.6,then P(A $\cup$ B)=

Accepted Answer

A) 0.62 
B) 0.12 
C) 0.60 
D) 0.68 
A) 0.62 
B) 0.12 
C) 0.60 
D) 0.68

Question 4

Assume your favorite football team has 3 games left to finish the season.The outcome of each game can be win,lose,or tie.How many possible outcomes exist?

Accepted Answer

A) 7 
B) 27 
C) 36 
D) 64 
A) 7 
B) 27 
C) 36 
D) 64

Question 5

From a group of six people,two individuals are to be selected at random.How many possible selections are there?

Accepted Answer

A) 12 
B) 36 
C) 15 
D) 8 
A) 12 
B) 36 
C) 15 
D) 8

Question 6

Any process that generates well-defined outcomes is

Accepted Answer

A) an event 
B) an experiment 
C) a sample point 
D) a sample space 
A) an event 
B) an experiment 
C) a sample point 
D) a sample space

Question 7

A perfectly balanced coin is tossed 6 times and tails appears on all six tosses.Then,on the seventh trial

Accepted Answer

A) tails can not appear 
B) heads has a larger chance of appearing than tails 
C) tails has a better chance of appearing than heads 
D) None of these alternatives is correct. 
A) tails can not appear 
B) heads has a larger chance of appearing than tails 
C) tails has a better chance of appearing than heads 
D) None of these alternatives is correct.

Question 8

Given that event E has a probability of 0.31,the probability of the complement of event E

Accepted Answer

A) cannot be determined with the above information 
B) can have any value between zero and one 
C) 0.69 
D) is 0.31 
A) cannot be determined with the above information 
B) can have any value between zero and one 
C) 0.69 
D) is 0.31

Question 9

When the assumption of equally likely outcomes is used to assign probability values,the method used to assign probabilities is referred to as the

Accepted Answer

A) relative frequency method 
B) subjective method 
C) probability method 
D) classical method 
A) relative frequency method 
B) subjective method 
C) probability method 
D) classical method

Question 10

The following table shows the number of students in three different degree programs and whether they are graduate or undergraduate students:
   
a.What is the probability that a randomly selected student is an undergraduate?
b.What percentage of students is engineering majors?
c.If we know that a selected student is an undergraduate,what is the probability that he or she is a business major?
d.A student is enrolled in the Arts and Sciences school.What is the probability that the student is an undergraduate student?
e.What is the probability that a randomly selected student is a graduate Business major?

Accepted Answer

a.0.8
b.35

Question 11

The multiplication law is potentially helpful when we are interested in computing the probability of

Accepted Answer

A) mutually exclusive events 
B) the intersection of two events 
C) the union of two events 
D) conditional events 
A) mutually exclusive events 
B) the intersection of two events 
C) the union of two events 
D) conditional events

Question 12

Initial estimates of the probabilities of events are known as

Accepted Answer

A) sets 
B) posterior probabilities 
C) conditional probabilities 
D) prior probabilities 
A) sets 
B) posterior probabilities 
C) conditional probabilities 
D) prior probabilities

Question 13

If P(A)= 0.7,P(B)= 0.6,P(A $\cap$ B)= 0,then events A and B are

Accepted Answer

A) not mutually exclusive 
B) mutually exclusive 
C) independent events 
D) complements of each other 
A) not mutually exclusive 
B) mutually exclusive 
C) independent events 
D) complements of each other

Question 14

On a December day,the probability of snow is .30.The probability of a "cold" day is .50.The probability of snow and "cold" weather is .15.Are snow and "cold" weather independent events?

Accepted Answer

A) only if given that it snowed 
B) no 
C) yes 
D) only when they are also mutually exclusive 
A) only if given that it snowed 
B) no 
C) yes 
D) only when they are also mutually exclusive

Question 15

If P(A)= 0.5 and P(B)= 0.5,then P(A $\cap$ B)

Accepted Answer

A) is 0.00 
B) is 1.00 
C) is 0.5 
D) None of these alternatives is correct. 
A) is 0.00 
B) is 1.00 
C) is 0.5 
D) None of these alternatives is correct.

Question 16

A method of assigning probabilities based on historical data is called the

Accepted Answer

A) classical method 
B) subjective method 
C) relative frequency method 
D) historical method 
A) classical method 
B) subjective method 
C) relative frequency method 
D) historical method

Question 17

In statistical experiments,each time the experiment is repeated

Accepted Answer

A) the same outcome must occur 
B) the same outcome can not occur again 
C) a different outcome may occur 
D) a different out come must occur 
A) the same outcome must occur 
B) the same outcome can not occur again 
C) a different outcome may occur 
D) a different out come must occur

Question 18

A statistics professor has noted from past experience that a student who follows a program of studying two hours for each hour in class has a probability of 0.9 of getting a grade of C or better,while a student who does not follow a regular study program has a probability of 0.2 of getting a C or better.It is known that 70% of the students follow the study program.Find the probability that a student who has earned a C or better grade,followed the program.

Accepted Answer

The answer of A statistics professor has noted from past...

Question 19

A survey of business students who had taken the Graduate Management Admission Test (GMAT)indicated that students who have spent at least five hours studying GMAT review guides have a probability of 0.85 of scoring above 400.Students who do not review have a probability of 0.65 of scoring above 400.It has been determined that 70% of the business students review for the test.
a.Find the probability of scoring above 400.
b.Find the probability that a student who scored above 400 reviewed for the test.

Accepted Answer

The answer of A survey of business students who had...

Question 20

The results of a survey of 800 married couples and the number of children they had is shown below.
   
If a couple is selected at random,what is the probability that the couple will have 
a.Less than 4 children?
b.More than 2 children?
c.Either 2 or 3 children?

Accepted Answer

a.0.925
b.

The range of probability is

A student has to take 9 more courses before he can graduate.If none of the courses are prerequisite to others,how many groups of four courses can he select for the next semester?

If A and B are independent events with P(A)= 0.2 and P(B)= 0.6,then P(A $\cup$ B)=

Assume your favorite football team has 3 games left to finish the season.The outcome of each game can be win,lose,or tie.How many possible outcomes exist?

From a group of six people,two individuals are to be selected at random.How many possible selections are there?

Any process that generates well-defined outcomes is

A perfectly balanced coin is tossed 6 times and tails appears on all six tosses.Then,on the seventh trial

Given that event E has a probability of 0.31,the probability of the complement of event E

When the assumption of equally likely outcomes is used to assign probability values,the method used to assign probabilities is referred to as the

The multiplication law is potentially helpful when we are interested in computing the probability of

Initial estimates of the probabilities of events are known as

If P(A)= 0.7,P(B)= 0.6,P(A $\cap$ B)= 0,then events A and B are

On a December day,the probability of snow is .30.The probability of a "cold" day is .50.The probability of snow and "cold" weather is .15.Are snow and "cold" weather independent events?

If P(A)= 0.5 and P(B)= 0.5,then P(A $\cap$ B)

A method of assigning probabilities based on historical data is called the

In statistical experiments,each time the experiment is repeated

The results of a survey of 800 married couples and the number of children they had is shown below. If a couple is selected at random,what is the probability that the couple will have a.Less than 4 children? b.More than 2 children? c.Either 2 or 3 children?

Data and Statistics

Descriptive Statistics: Tabular and Graphical Presentations

Descriptive Statistics: Numerical Measures

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Statistical Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Tests of Goodness of Fit and Independence

Analysis of Variance and Experimental Design

Simple Linear Regression

Multiple Regression

Regression Analysis: Model Building

Index Numbers

Forecasting

Nonparametric Methods

Statistical Methods for Quality Control

Decision Analysis

Sample Survey

Filters

Exam 4: Introduction to Probability

The range of probability is

A student has to take 9 more courses before he can graduate.If none of the courses are prerequisite to others,how many groups of four courses can he select for the next semester?

If A and B are independent events with P(A)= 0.2 and P(B)= 0.6,then P(A ∪\cup∪ B)=

Assume your favorite football team has 3 games left to finish the season.The outcome of each game can be win,lose,or tie.How many possible outcomes exist?

From a group of six people,two individuals are to be selected at random.How many possible selections are there?

Any process that generates well-defined outcomes is

A perfectly balanced coin is tossed 6 times and tails appears on all six tosses.Then,on the seventh trial

Given that event E has a probability of 0.31,the probability of the complement of event E

When the assumption of equally likely outcomes is used to assign probability values,the method used to assign probabilities is referred to as the

The multiplication law is potentially helpful when we are interested in computing the probability of

Initial estimates of the probabilities of events are known as

If P(A)= 0.7,P(B)= 0.6,P(A ∩\cap∩ B)= 0,then events A and B are

On a December day,the probability of snow is .30.The probability of a "cold" day is .50.The probability of snow and "cold" weather is .15.Are snow and "cold" weather independent events?

If P(A)= 0.5 and P(B)= 0.5,then P(A ∩\cap∩ B)

A method of assigning probabilities based on historical data is called the

In statistical experiments,each time the experiment is repeated

The results of a survey of 800 married couples and the number of children they had is shown below. If a couple is selected at random,what is the probability that the couple will have a.Less than 4 children? b.More than 2 children? c.Either 2 or 3 children?

Data and Statistics

Descriptive Statistics: Tabular and Graphical Presentations

Descriptive Statistics: Numerical Measures

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Statistical Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Tests of Goodness of Fit and Independence

Analysis of Variance and Experimental Design

Simple Linear Regression

Multiple Regression

Regression Analysis: Model Building

Index Numbers

Forecasting

Nonparametric Methods

Statistical Methods for Quality Control

Decision Analysis

Sample Survey

Filters

If A and B are independent events with P(A)= 0.2 and P(B)= 0.6,then P(A $\cup$ B)=

If P(A)= 0.7,P(B)= 0.6,P(A $\cap$ B)= 0,then events A and B are

If P(A)= 0.5 and P(B)= 0.5,then P(A $\cap$ B)