Question 1

Any process that generates well-defined outcomes is

Accepted Answer

A)  an event
B)  an experiment
C)  a sample point
D)  None of the other answers is correct.

Question 2

One of the basic requirements of probability is

Accepted Answer

A)  for each experimental outcome Ei,we must have P(Ei) ≥ 1
B)  P(
A)  = P(Ac) − 1
C)  if there are k experimental outcomes,then P(E1) + P(E2) + ...+ P(Ek) = 1
D)  both P(
A)  = P(Ac) − 1 and if there are k experimental outcomes,then P(E1) + P(E2) + ...+ P(Ek) = 1

Question 3

P(A|B)= P(B|A)for all events A and B.

Accepted Answer

A) True 
 B)False

Question 4

An experiment consists of tossing 4 coins successively.The number of sample points in this experiment is

Accepted Answer

A)  16
B)  8
C)  4
D)  2

Question 5

P(A|B)+ P(A|BC)= 1 for all events A and B.

Accepted Answer

A) True 
 B)False

Question 6

Describe four experiments and list the experimental outcomes associated with each one.​

Accepted Answer

Experiment 1: Testing the effects of caf...

Question 7

P(A|B)= P(AC|B)for all events A and B.

Accepted Answer

A) True 
 B)False

Question 8

P(A|B)= 1 − P(B|A)for all events A and B.

Accepted Answer

A) True 
 B)False

Question 9

Before drawing any conclusions about the relationship between two variables shown in a crosstabulation,you should

Accepted Answer

A)  investigate whether any hidden variables could affect the conclusions
B)  construct a scatter diagram and find the trendline
C)  develop a relative frequency distribution
D)  construct an ogive for each of the variables

Question 10

A posterior probability is a conditional probability.

Accepted Answer

A) True 
 B)False

Question 11

When the conclusions based upon the aggregated crosstabulation can be completely reversed if we look at the unaggregated data,the occurrence is known as

Accepted Answer

A)  reverse correlation
B)  inferential statistics
C)  Simpson's paradox
D)  disaggregation

Question 12

Explain the difference between mutually exclusive and independent events.Can a pair of events be both mutually exclusive and independent?​

Accepted Answer

Mutually exclusive events are events tha...

Question 13

If P(A|B) = .2 and P(Bc) = .6,then P(B|A)

Accepted Answer

A)  is .8
B)  is .12
C)  is .33
D)  cannot be determined.

Question 14

The complement of P(A | B) is

Accepted Answer

A)  P(AC | 
B)  
B)  P(A | B
C)  
C)  P(B | 
A)  
D)  P(A I 
B)

Question 15

Two events that are mutually exclusive cannot be independent.

Accepted Answer

A) True 
 B)False

Question 16

If P(A|B) = .4,then

Accepted Answer

A)  P(B|
A)  = .6
B)  P(
A)  *P(
B)  = .4
C)  P(
A)  / P(
B)  = .4
D)  None of the alternatives is correct.

Question 17

If A and B are mutually exclusive events,then P(A | B)= 0.

Accepted Answer

A) True 
 B)False

Question 18

A joint probability can have a value greater than 1.

Accepted Answer

A) True 
 B)False

Question 19

Discuss the problems inherent in using words such as "likely," "possibly," or "probably" to convey degree of belief.​

Accepted Answer

Using words such as "likely," "possibly,...

Question 20

Which of the following is not a valid representation of a probability?

Accepted Answer

A)  35%
B)  0
C)  1.04
D)  3/8

Exam 2: Introduction to Probability

An experiment consists of tossing 4 coins successively.The number of sample points in this experiment is

Correct AnswerverifiedShow Answer

If P(A|B) = .2 and P(Bc) = .6,then P(B|A)

Correct AnswerverifiedShow Answer

A joint probability can have a value greater than 1.

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P(A|B)= P(AC|B)for all events A and B.

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P(A|B)+ P(A|BC)= 1 for all events A and B.

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Before drawing any conclusions about the relationship between two variables shown in a crosstabulation,you should

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If A and B are mutually exclusive events,then P(A | B)= 0.

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Any process that generates well-defined outcomes is

Correct AnswerverifiedShow Answer

Discuss the problems inherent in using words such as "likely," "possibly," or "probably" to convey degree of belief.​

Correct AnswerAnswered by ExamLex AIUsing words such as "likely," "possibly,...View AnswerShow Answer

Describe four experiments and list the experimental outcomes associated with each one.​

Correct AnswerAnswered by ExamLex AIExperiment 1: Testing the effects of caf...View AnswerShow Answer

Explain the difference between mutually exclusive and independent events.Can a pair of events be both mutually exclusive and independent?​

Correct AnswerAnswered by ExamLex AIMutually exclusive events are events tha...View AnswerShow Answer

A posterior probability is a conditional probability.

Correct AnswerverifiedShow Answer

When the conclusions based upon the aggregated crosstabulation can be completely reversed if we look at the unaggregated data,the occurrence is known as

Correct AnswerverifiedShow Answer

Which of the following is not a valid representation of a probability?

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The complement of P(A | B) is

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One of the basic requirements of probability is

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P(A|B)= P(B|A)for all events A and B.

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If P(A|B) = .4,then

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P(A|B)= 1 − P(B|A)for all events A and B.

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Two events that are mutually exclusive cannot be independent.

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If P(A|B) = .2 and P(B^c) = .6,then P(B|A)

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P(A|B)= P(A^C|B)for all events A and B.

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P(A|B)+ P(A|B^C)= 1 for all events A and B.

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Discuss the problems inherent in using words such as "likely," "possibly," or "probably" to convey degree of belief.

Correct Answer
Answered by ExamLex AI
Using words such as "likely," "possibly,...
View Answer

Describe four experiments and list the experimental outcomes associated with each one.

Correct Answer
Answered by ExamLex AI
Experiment 1: Testing the effects of caf...
View Answer

Explain the difference between mutually exclusive and independent events.Can a pair of events be both mutually exclusive and independent?

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Answered by ExamLex AI
Mutually exclusive events are events tha...
View Answer

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