Question 1

How might a Poisson probability distribution be used in business processes?

Accepted Answer

Since a Poisson distribution is used to

Question 2

The two parameters sufficient to describe the normal probability distribution are μ and σ.

Accepted Answer

A) True 
 B)False

Question 3

Two events are mutually exclusive as long as ________.

Accepted Answer

A) they can occur simultaneously 
B) they have two outcomes in common 
C) they have no outcomes in common 
D) between them,they account for every event in the sample space 
A) they can occur simultaneously 
B) they have two outcomes in common 
C) they have no outcomes in common 
D) between them,they account for every event in the sample space

Question 4

The standard normal probability distribution uses the z-statistic.

Accepted Answer

A) True 
 B)False

Question 5

Probability is ________.

Accepted Answer

A) the observed result of an experiment 
B) the chance that an event will not happen 
C) the likelihood that an outcome occurs 
D) the number of successes divided by the number of failures 
A) the observed result of an experiment 
B) the chance that an event will not happen 
C) the likelihood that an outcome occurs 
D) the number of successes divided by the number of failures

Question 6

A cumulative distribution function,F(x),specifies the probability that the random variable X will assume a value greater than or equal to a specified value,x.

Accepted Answer

A) True 
 B)False

Question 7

In an experiment,a random variable is ________.

Accepted Answer

A) a value picked from a set of values that all have an equal chance of occurring 
B) a variable chosen at random from a distribution list 
C) an outcome that has zero chances of occurring 
D) a numerical description of the outcome of an experiment 
A) a value picked from a set of values that all have an equal chance of occurring 
B) a variable chosen at random from a distribution list 
C) an outcome that has zero chances of occurring 
D) a numerical description of the outcome of an experiment

Question 8

Which of the following is true of classical probability?

Accepted Answer

A) It is based on theoretical arguments. 
B) It is determined by historical data and past outcomes. 
C) It is based on experimental data. 
D) It is based on personal judgment. 
A) It is based on theoretical arguments. 
B) It is determined by historical data and past outcomes. 
C) It is based on experimental data. 
D) It is based on personal judgment.

Question 9

The probability of the complement of an event W is ________.

Accepted Answer

A) the probability of all of the outcomes that are not in that event W 
B) twice the probability of the original event W 
C) usually the same as the probability of event W 
D) the square of the probability of the event W 
A) the probability of all of the outcomes that are not in that event W 
B) twice the probability of the original event W 
C) usually the same as the probability of event W 
D) the square of the probability of the event W

Question 10

Subjective probability ________.

Accepted Answer

A) can have all probabilities deduced from theoretical arguments because the process that generates the outcomes is known 
B) is based on personal judgment 
C) is the same as conditional probability 
D) is based on experimental data 
A) can have all probabilities deduced from theoretical arguments because the process that generates the outcomes is known 
B) is based on personal judgment 
C) is the same as conditional probability 
D) is based on experimental data

Question 11

For probability purposes,an experiment is ________.

Accepted Answer

A) a process that results in some outcome 
B) the collection of all possible outcomes 
C) a theoretical result 
D) the absolute values of all outcomes 
A) a process that results in some outcome 
B) the collection of all possible outcomes 
C) a theoretical result 
D) the absolute values of all outcomes

Question 12

Compare and contrast a probability mass function and a probability density function.

Accepted Answer

A probability mass function represents a

Question 13

The expected value of a random variable corresponds to the notion of the ________ of a sample.

Accepted Answer

A) median 
B) mode 
C) mean 
D) range 
A) median 
B) mode 
C) mean 
D) range

Question 14

Standardized z values can be used to find a probability using ________.

Accepted Answer

A) a discrete continuous table of values 
B) the standard normal table 
C) the t-table 
D) the formula P(X)=   
A) a discrete continuous table of values 
B) the standard normal table 
C) the t-table 
D) the formula P(X)=

Question 15

Which of the following is not true for a normal distribution?

Accepted Answer

A) The curve for a normal distribution is symmetric. 
B) One-third of the total area falls above the mean. 
C) The tails of the distribution extend to negative and positive infinity. 
D) 99% of the area lies within 3 standard deviations of the mean. 
A) The curve for a normal distribution is symmetric. 
B) One-third of the total area falls above the mean. 
C) The tails of the distribution extend to negative and positive infinity. 
D) 99% of the area lies within 3 standard deviations of the mean.

Question 16

At a particular toll booth,20% of vehicles use transponders while the rest have their license plates scanned.Usually,150 vehicles pass this toll booth during any one hour time period.During the next hour,what is the probability that more than 40 vehicles will pass through using a transponder?

Accepted Answer

A) 3.23% 
B) 6.17% 
C) 1.85% 
D) 96.77% 
A) 3.23% 
B) 6.17% 
C) 1.85% 
D) 96.77%

Question 17

It was reported that the mean high temperature in the continental United States on October 5,2011 was 75.77°F,with a standard deviation of 10.95°F.If temperature in the U.S.follows a normal distribution,what is the probability that a city chosen at random reported a temperature higher than 90°F?

Accepted Answer

μ = 75.55,σ = 10.95,and x = 90.Using Exc

Question 18

What is the probability of choosing a day of the week that begins with T (Tuesday or Thursday)?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 19

Which of the following is true of random variables?

Accepted Answer

A) Random variables may not have a physical or natural meaning. 
B) Random variables are used with data that is numerical. 
C) Each element in a sample space is represented by a random variable. 
D) The probability of the occurrence of an event is represented by a random variable. 
A) Random variables may not have a physical or natural meaning. 
B) Random variables are used with data that is numerical. 
C) Each element in a sample space is represented by a random variable. 
D) The probability of the occurrence of an event is represented by a random variable.

Question 20

It has been reported that,on average,families in Colorado Springs eat fast food 2.2 times per week with a standard deviation of 1.1 times per week.Assume that the distribution of the number of times that families eat fast food is a normal distribution.What is the likelihood that a family eats fast food one to three times each week?

Accepted Answer

μ = 2.2,σ = 1.1.Using Excel "=

How might a Poisson probability distribution be used in business processes?

The two parameters sufficient to describe the normal probability distribution are μ and σ.

Two events are mutually exclusive as long as ________.

The standard normal probability distribution uses the z-statistic.

Probability is ________.

A cumulative distribution function,F(x),specifies the probability that the random variable X will assume a value greater than or equal to a specified value,x.

In an experiment,a random variable is ________.

Which of the following is true of classical probability?

The probability of the complement of an event W is ________.

Subjective probability ________.

For probability purposes,an experiment is ________.

Compare and contrast a probability mass function and a probability density function.

The expected value of a random variable corresponds to the notion of the ________ of a sample.

Standardized z values can be used to find a probability using ________.

Which of the following is not true for a normal distribution?

At a particular toll booth,20% of vehicles use transponders while the rest have their license plates scanned.Usually,150 vehicles pass this toll booth during any one hour time period.During the next hour,what is the probability that more than 40 vehicles will pass through using a transponder?

It was reported that the mean high temperature in the continental United States on October 5,2011 was 75.77°F,with a standard deviation of 10.95°F.If temperature in the U.S.follows a normal distribution,what is the probability that a city chosen at random reported a temperature higher than 90°F?

What is the probability of choosing a day of the week that begins with T (Tuesday or Thursday)?

Which of the following is true of random variables?

Data and Business Decisions

Descriptive Statistics and Data Analysis

Sampling and Estimation

Hypothesis Testing and Statistical Inference

Regression Analysis

Forecasting

Introduction to Statistical Quality Control

Building and Using Decision Models

Decision Models With Uncertainty and Risk

Decisions, uncertainty, and Risk

Queues and Process Simulation Modeling

Linear Optimization

Integer, nonlinear, and Advanced Optimization Methods

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Exam 3: Probability Concepts and Distributions

How might a Poisson probability distribution be used in business processes?

The two parameters sufficient to describe the normal probability distribution are μ and σ.

Two events are mutually exclusive as long as ________.

The standard normal probability distribution uses the z-statistic.

Probability is ________.

A cumulative distribution function,F(x),specifies the probability that the random variable X will assume a value greater than or equal to a specified value,x.

In an experiment,a random variable is ________.

Which of the following is true of classical probability?

The probability of the complement of an event W is ________.

Subjective probability ________.

For probability purposes,an experiment is ________.

Compare and contrast a probability mass function and a probability density function.

The expected value of a random variable corresponds to the notion of the ________ of a sample.

Standardized z values can be used to find a probability using ________.

Which of the following is not true for a normal distribution?

At a particular toll booth,20% of vehicles use transponders while the rest have their license plates scanned.Usually,150 vehicles pass this toll booth during any one hour time period.During the next hour,what is the probability that more than 40 vehicles will pass through using a transponder?

It was reported that the mean high temperature in the continental United States on October 5,2011 was 75.77°F,with a standard deviation of 10.95°F.If temperature in the U.S.follows a normal distribution,what is the probability that a city chosen at random reported a temperature higher than 90°F?

What is the probability of choosing a day of the week that begins with T (Tuesday or Thursday)?

Which of the following is true of random variables?

Data and Business Decisions

Descriptive Statistics and Data Analysis

Sampling and Estimation

Hypothesis Testing and Statistical Inference

Regression Analysis

Forecasting

Introduction to Statistical Quality Control

Building and Using Decision Models

Decision Models With Uncertainty and Risk

Decisions, uncertainty, and Risk

Queues and Process Simulation Modeling

Linear Optimization

Integer, nonlinear, and Advanced Optimization Methods

Filters