Question 1

If two events are mutually exclusive,then their joint probability is always zero.

Accepted Answer

A) True 
 B)False

Question 2

Let A be the event that a student is enrolled in an accounting course,and let S be the event that a student is enrolled in a statistics course.It is known that 30% of all students are enrolled in an accounting course and 40% of all students are enrolled in statistics.Included in these numbers are 15% who are enrolled in both statistics and accounting.A student is randomly selected,what is the probability that the student is enrolled in either accounting or statistics or both?

Accepted Answer

A) 0.15 
B) 0.85 
C) 0.70 
D) 0.55 
E) 0.90 
A) 0.15 
B) 0.85 
C) 0.70 
D) 0.55 
E) 0.90

Question 3

If X and Y are mutually exclusive events,then if X occurs,___.

Accepted Answer

A) Y must also occur 
B) Y cannot occur 
C) X and Y are independent 
D) X and Y are complements 
E) A and Y are collectively exhaustive 
A) Y must also occur 
B) Y cannot occur 
C) X and Y are independent 
D) X and Y are complements 
E) A and Y are collectively exhaustive

Question 4

An automobile dealer wishes to investigate the relation between the gender of the buyer and type of vehicle purchased.Based on the following joint probability table that was developed from the dealer's records for the previous year,P (Male)= ___.

Accepted Answer

A) 0.48 
B) 0.50 
C) 0.20 
D) 0.02 
E) 0.60 
A) 0.48 
B) 0.50 
C) 0.20 
D) 0.02 
E) 0.60

Question 5

Abel Alonzo,Director of Human Resources,is exploring employee absenteeism at the Plano Power Plant.Ten percent of all plant employees work in the finishing department;20% of all plant employees are absent excessively;and 7% of all plant employees work in the finishing department and are absent excessively.A plant employee is selected randomly;F is the event "works in the finishing department;" and A is the event "is absent excessively." P(A $\cup$ F)= ___.

Accepted Answer

A) 0.07 
B) 0.10 
C) 0.20 
D) 0.23 
E) 0.37 
A) 0.07 
B) 0.10 
C) 0.20 
D) 0.23 
E) 0.37

Question 6

Meagan Dubean manages a portfolio of 200 common stocks.Her staff classified the portfolio stocks by 'industry sector' and 'investment objective.'   If a stock is selected randomly from Meagan's portfolio,P (Growth)= ___.

Accepted Answer

A) 0.50 
B) 0.83 
C) 0.67 
D) 0.75 
E) 0.90 
A) 0.50 
B) 0.83 
C) 0.67 
D) 0.75 
E) 0.90

Question 7

Meagan Dubean manages a portfolio of 200 common stocks.Her staff classified the portfolio stocks by 'industry sector' and 'investment objective.'   Which of the following statements is not true?

Accepted Answer

A) Growth and Income are complementary events. 
B) Electronics and Growth are dependent. 
C) Electronics and Healthcare are mutually exclusive. 
D) Airlines and Healthcare are collectively exhaustive. 
E) Growth and Income are collectively exhaustive. 
A) Growth and Income are complementary events. 
B) Electronics and Growth are dependent. 
C) Electronics and Healthcare are mutually exclusive. 
D) Airlines and Healthcare are collectively exhaustive. 
E) Growth and Income are collectively exhaustive.

Question 8

Calculate joint probabilities of both independent and dependent events using the general and special laws of multiplication.

Accepted Answer

The general law of addition is used when

Question 9

The list of all elementary events for an experiment is called ___.

Accepted Answer

A) the sample space 
B) the exhaustive list 
C) the population space 
D) the event union 
E) a frame 
A) the sample space 
B) the exhaustive list 
C) the population space 
D) the event union 
E) a frame

Question 10

Compare marginal,union,joint,and conditional probabilities by defining each one.

Accepted Answer

Three techniques for counting the possib

Question 11

Calculate conditional probabilities using Bayes' rule.

Accepted Answer

Bayes' rule is a method that can be used

Question 12

Abel Alonzo,Director of Human Resources,is exploring employee absenteeism at the Plano Power Plant.Ten percent of all plant employees work in the finishing department;20% of all plant employees are absent excessively;and 7% of all plant employees work in the finishing department and are absent excessively.A plant employee is selected randomly;F is the event "works in the finishing department;" and A is the event "is absent excessively." P(A|F)= __.

Accepted Answer

A) 0.37 
B) 0.70 
C) 0.13 
D) 0.35 
E) 0.80 
A) 0.37 
B) 0.70 
C) 0.13 
D) 0.35 
E) 0.80

If two events are mutually exclusive,then their joint probability is always zero.

If X and Y are mutually exclusive events,then if X occurs,___.

An automobile dealer wishes to investigate the relation between the gender of the buyer and type of vehicle purchased.Based on the following joint probability table that was developed from the dealer's records for the previous year,P (Male)= ___.

Meagan Dubean manages a portfolio of 200 common stocks.Her staff classified the portfolio stocks by 'industry sector' and 'investment objective.' If a stock is selected randomly from Meagan's portfolio,P (Growth)= ___.

Meagan Dubean manages a portfolio of 200 common stocks.Her staff classified the portfolio stocks by 'industry sector' and 'investment objective.' Which of the following statements is not true?

Calculate joint probabilities of both independent and dependent events using the general and special laws of multiplication.

The list of all elementary events for an experiment is called ___.

Compare marginal,union,joint,and conditional probabilities by defining each one.

Calculate conditional probabilities using Bayes' rule.

Introduction to Statistics

Charts and Graphs

Descriptive Statistics

Discrete Distributions

Continuous Distributions

Sampling and Sampling Distributions

Statistical Inference: Estimation for Single Populations

Statistical Inference: Hypothesis Testing for Single Populations

Statistical Inferences About Two Populations

Analysis of Variance and Design of Experiments

Simple Regression Analysis and Correlation

Multiple Regression Analysis

Building Multiple Regression Models

Time-Series Forecasting and Index Numbers

Analysis of Categorical Data

Nonparametric Statistics

Statistical Quality Control

Decision Analysis

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Exam 4: Probability

If two events are mutually exclusive,then their joint probability is always zero.

If X and Y are mutually exclusive events,then if X occurs,___.

An automobile dealer wishes to investigate the relation between the gender of the buyer and type of vehicle purchased.Based on the following joint probability table that was developed from the dealer's records for the previous year,P (Male)= ___.

Meagan Dubean manages a portfolio of 200 common stocks.Her staff classified the portfolio stocks by 'industry sector' and 'investment objective.' If a stock is selected randomly from Meagan's portfolio,P (Growth)= ___.

Meagan Dubean manages a portfolio of 200 common stocks.Her staff classified the portfolio stocks by 'industry sector' and 'investment objective.' Which of the following statements is not true?

Calculate joint probabilities of both independent and dependent events using the general and special laws of multiplication.

The list of all elementary events for an experiment is called ___.

Compare marginal,union,joint,and conditional probabilities by defining each one.

Calculate conditional probabilities using Bayes' rule.

Introduction to Statistics

Charts and Graphs

Descriptive Statistics

Discrete Distributions

Continuous Distributions

Sampling and Sampling Distributions

Statistical Inference: Estimation for Single Populations

Statistical Inference: Hypothesis Testing for Single Populations

Statistical Inferences About Two Populations

Analysis of Variance and Design of Experiments

Simple Regression Analysis and Correlation

Multiple Regression Analysis

Building Multiple Regression Models

Time-Series Forecasting and Index Numbers

Analysis of Categorical Data

Nonparametric Statistics

Statistical Quality Control

Decision Analysis

Filters