Question 1

Which of the following is not a proper sample space when all undergraduates at a university are considered?

Accepted Answer

A)  S = {in-state, out-of-state} 
B)  S = {freshmen, sophomores} 
C)  S = {age under 21, age 21 or over} 
D)  S = {a business major, not a business major} 
A)  S = {in-state, out-of-state} 
B)  S = {freshmen, sophomores} 
C)  S = {age under 21, age 21 or over} 
D)  S = {a business major, not a business major}

Question 2

An element of the sample space is

Accepted Answer

A)  an event. 
B)  an experiment. 
C)  a sample point. 
D)  probability. 
A)  an event. 
B)  an experiment. 
C)  a sample point. 
D)  probability.

Question 3

Six puppies were born in a litter, and it is determined whether each puppy is male or female.How many sample points exist in the above experiment?

Accepted Answer

A)  64 
B)  32 
C)  16 
D)  4 
A)  64 
B)  32 
C)  16 
D)  4

Question 4

The probability of an intersection of two events is computed using the _____ law.

Accepted Answer

A)  addition 
B)  subtraction 
C)  multiplication 
D)  division 
A)  addition 
B)  subtraction 
C)  multiplication 
D)  division

Question 5

The counting rule that is used for counting the number of experimental outcomes when n objects are selected from a set of N objects where order of selection is important is called the counting rule for

Accepted Answer

A)  permutations. 
B)  combinations. 
C)  independent events. 
D)  multiple-step random experiments. 
A)  permutations. 
B)  combinations. 
C)  independent events. 
D)  multiple-step random experiments.

Question 6

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

Question 7

An experiment consists of selecting a student body president and vice president.All undergraduate students (freshmen through seniors) are eligible for these offices.How many sample points (possible outcomes as to the classifications) exist?

Accepted Answer

A)  4 
B)  16 
C)  8 
D)  32 
A)  4 
B)  16 
C)  8 
D)  32

Question 8

If P(A)= 0.6, P(B) = 0.5, and P(A *B) =0.20, then P(B | A) =

Accepted Answer

A)  .33. 
B)  .4. 
C)  .9. 
D)  .5. 
A)  .33. 
B)  .4. 
C)  .9. 
D)  .5.

Question 9

From among 8 students how many committees consisting of 4 students can be selected?

Accepted Answer

The answer of From among 8 students how many committees...

Question 10

The probability of the occurrence of event A in an experiment is 1/3.If the experiment is performed 2 times and event A did not occur, then on the third trial event A

Accepted Answer

A)  must occur. 
B)  may occur. 
C)  could not occur. 
D)  has a 2/3 probability of occurring. 
A)  must occur. 
B)  may occur. 
C)  could not occur. 
D)  has a 2/3 probability of occurring.

Question 11

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 might 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 might occur. 
D)  a different out come must occur.

Question 12

The range of probability values is

Accepted Answer

A)  0 to infinity. 
B)  minus infinity to plus infinity. 
C)  0 to 1. 
D)  -1 to 1. 
A)  0 to infinity. 
B)  minus infinity to plus infinity. 
C)  0 to 1. 
D)  -1 to 1.

Question 13

From a group of ten finalists to a contest, three individuals are to be selected for the first and second and third places.Determine the number of possible selections.

Accepted Answer

The answer of From a group of ten finalists to...

Question 14

Of the last 100 customers entering a computer shop, 40have purchased a computer.If the classical method for computing probability is used, the probability that the next customer will purchase a computer is

Accepted Answer

A)  0.40. 
B)  0.50. 
C)  1.00. 
D)  0.60. 
A)  0.40. 
B)  0.50. 
C)  1.00. 
D)  0.60.

Question 15

The probability of an event is the _____ of the probabilities of the sample points in the event.

Accepted Answer

A)  sum 
B)  product 
C)  minimum 
D)  maximum 
A)  sum 
B)  product 
C)  minimum 
D)  maximum

Question 16

If A and B are independent events with P(A) = 0.2 and P(B) = 0.6, then P(A ∪ 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 17

A collection of sample points is a(n)

Accepted Answer

A)  event. 
B)  union. 
C)  intersection. 
D)  permutation. 
A)  event. 
B)  union. 
C)  intersection. 
D)  permutation.

Question 18

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

Accepted Answer

A)  classical 
B)  subjective 
C)  relative frequency 
D)  progressive 
A)  classical 
B)  subjective 
C)  relative frequency 
D)  progressive

Question 19

The intersection of two mutually exclusive events

Accepted Answer

A)  can be any value between 0 to1. 
B)  must always be equal to 1. 
C)  must always be equal to 0. 
D)  can be any positive value. 
A)  can be any value between 0 to1. 
B)  must always be equal to 1. 
C)  must always be equal to 0. 
D)  can be any positive value.

Question 20

If A and B are independent events with P(A) = 0.35 and P(B) = 0.20, then, P(A ∪ B) =

Accepted Answer

A)  0.07. 
B)  0.62. 
C)  0.55. 
D)  0.48. 
A)  0.07. 
B)  0.62. 
C)  0.55. 
D)  0.48.

Which of the following is not a proper sample space when all undergraduates at a university are considered?

An element of the sample space is

Six puppies were born in a litter, and it is determined whether each puppy is male or female.How many sample points exist in the above experiment?

The probability of an intersection of two events is computed using the _____ law.

The counting rule that is used for counting the number of experimental outcomes when n objects are selected from a set of N objects where order of selection is important is called the counting rule for

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

An experiment consists of selecting a student body president and vice president.All undergraduate students (freshmen through seniors) are eligible for these offices.How many sample points (possible outcomes as to the classifications) exist?

If P(A)= 0.6, P(B) = 0.5, and P(A *B) =0.20, then P(B | A) =

From among 8 students how many committees consisting of 4 students can be selected?

The probability of the occurrence of event A in an experiment is 1/3.If the experiment is performed 2 times and event A did not occur, then on the third trial event A

In statistical experiments, each time the experiment is repeated

The range of probability values is

From a group of ten finalists to a contest, three individuals are to be selected for the first and second and third places.Determine the number of possible selections.

Of the last 100 customers entering a computer shop, 40have purchased a computer.If the classical method for computing probability is used, the probability that the next customer will purchase a computer is

The probability of an event is the _____ of the probabilities of the sample points in the event.

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

A collection of sample points is a(n)

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

The intersection of two mutually exclusive events

If A and B are independent events with P(A) = 0.35 and P(B) = 0.20, then, P(A ∪ B) =

Data and Statistics

Descriptive Statistics: Tabular and Graphical Displays

Descriptive Statistics: Numerical Measures

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Comparing Multiple Proportions, Tests of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Filters

Exam 4: Introduction to Probability

Which of the following is not a proper sample space when all undergraduates at a university are considered?

An element of the sample space is

Six puppies were born in a litter, and it is determined whether each puppy is male or female.How many sample points exist in the above experiment?

The probability of an intersection of two events is computed using the _____ law.

The counting rule that is used for counting the number of experimental outcomes when n objects are selected from a set of N objects where order of selection is important is called the counting rule for

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

An experiment consists of selecting a student body president and vice president.All undergraduate students (freshmen through seniors) are eligible for these offices.How many sample points (possible outcomes as to the classifications) exist?

If P(A)= 0.6, P(B) = 0.5, and P(A *B) =0.20, then P(B | A) =

From among 8 students how many committees consisting of 4 students can be selected?

The probability of the occurrence of event A in an experiment is 1/3.If the experiment is performed 2 times and event A did not occur, then on the third trial event A

In statistical experiments, each time the experiment is repeated

The range of probability values is

From a group of ten finalists to a contest, three individuals are to be selected for the first and second and third places.Determine the number of possible selections.

Of the last 100 customers entering a computer shop, 40have purchased a computer.If the classical method for computing probability is used, the probability that the next customer will purchase a computer is

The probability of an event is the _____ of the probabilities of the sample points in the event.

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

A collection of sample points is a(n)

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

The intersection of two mutually exclusive events

If A and B are independent events with P(A) = 0.35 and P(B) = 0.20, then, P(A ∪ B) =

Data and Statistics

Descriptive Statistics: Tabular and Graphical Displays

Descriptive Statistics: Numerical Measures

Discrete Probability Distributions

Continuous Probability Distributions

Sampling and Sampling Distributions

Interval Estimation

Hypothesis Tests

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Comparing Multiple Proportions, Tests of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Filters