Question 1

Using the standard normal curve,the Z- score representing the 75th percentile is 0.674.

Accepted Answer

A) True 
 B)False

Question 2

Given that the random variable X is normally distributed with a mean of 80 and a standard deviation of 10,P(85  3 6_11X $\leq$90)is

Accepted Answer

A)  0.5328 
B)  0.3413 
C)  0.1915 
D)  0.1498 
A)  0.5328 
B)  0.3413 
C)  0.1915 
D)  0.1498

Question 3

The binomial distribution is a discrete distribution that deals with a sequence of identical trials,each of which has only two possible outcomes.

Accepted Answer

A) True 
 B)False

Question 4

The Poisson distribution is applied to events for which the probability of occurrence over a given span of time,space,or distance is very small.

Accepted Answer

A) True 
 B)False

Question 5

A continuous probability distribution is characterized by:

Accepted Answer

A)  a list of possible values 
B)  counts 
C)  an array of individual values 
D)  a continuum of possible values 
A)  a list of possible values 
B)  counts 
C)  an array of individual values 
D)  a continuum of possible values

Question 6

The Poisson probability distribution is one of the most commonly used continuous probability distributions.

Accepted Answer

A) True 
 B)False

Question 7

If the random variable X is normally distributed with mean $\mu$ and standard deviation $\sigma$ ,then the random variable Z defined by $Z = ( X - \mu ) / \sigma$ is also normally distributed with mean 0 and standard deviation 1.

Accepted Answer

A) True 
 B)False

Question 8

The normal distribution is:

Accepted Answer

A)  a discrete distribution with two parameters 
B)  a binomial distribution with only one parameter 
C)  a density function of a discrete random variable 
D)  a continuous distribution with two parameters 
A)  a discrete distribution with two parameters 
B)  a binomial distribution with only one parameter 
C)  a density function of a discrete random variable 
D)  a continuous distribution with two parameters

Question 9

A random variable X is standardized when each value of X has the mean of X subtracted from it,and the difference is divided by the standard deviation of X.

Accepted Answer

A) True 
 B)False

Question 10

Calculate the mean,variance,and standard deviation for the entire year (assume 52 weeks in the year).
A recent survey in Michigan revealed that 60% of the vehicles traveling on highways,where speed limits are posted at 70 miles per hour,were exceeding the limit.Suppose you randomly record the speeds of ten vehicles traveling on US 131 where the speed limit is 70 miles per hour.Let X denote the number of vehicles that were exceeding the limit.

Accepted Answer

Mean = 2,080,000,Var

Question 11

The standard deviation $\sigma$
Of a probability distribution is a:

Accepted Answer

A)  measure of variability of the distribution 
B)  measure of central location 
C)  measure of relative likelihood 
D)  measure of skewness of the distribution 
A)  measure of variability of the distribution 
B)  measure of central location 
C)  measure of relative likelihood 
D)  measure of skewness of the distribution

Question 12

Which of the following might not be appropriately modeled with a normal distribution?

Accepted Answer

A)  The daily low temperature in Anchorage,Alaska 
B)  The returns on a stock 
C)  The daily change in inventory at a computer manufacturer 
D)  The salaries of employees at a large company 
A)  The daily low temperature in Anchorage,Alaska 
B)  The returns on a stock 
C)  The daily change in inventory at a computer manufacturer 
D)  The salaries of employees at a large company

Question 13

The binomial distribution deals with consecutive trials,each of which has two possible outcomes.

Accepted Answer

A) True 
 B)False

Question 14

Using the standard normal distribution,the Z- score representing the 99th percentile is 2.326.

Accepted Answer

A) True 
 B)False

Question 15

The Poisson random variable is a discrete random variable with infinitely many possible values.

Accepted Answer

A) True 
 B)False

Question 16

The number of loan defaults per month at a bank is Poisson distributed.

Accepted Answer

A) True 
 B)False

Using the standard normal curve,the Z- score representing the 75th percentile is 0.674.

Given that the random variable X is normally distributed with a mean of 80 and a standard deviation of 10,P(85 11ea936b_b5ad_521a_b28d_990181381f2c_TB13 6_11X $\leq$ 90)is

The binomial distribution is a discrete distribution that deals with a sequence of identical trials,each of which has only two possible outcomes.

The Poisson distribution is applied to events for which the probability of occurrence over a given span of time,space,or distance is very small.

A continuous probability distribution is characterized by:

The Poisson probability distribution is one of the most commonly used continuous probability distributions.

If the random variable X is normally distributed with mean $\mu$ and standard deviation $\sigma$ ,then the random variable Z defined by $Z = ( X - \mu ) / \sigma$ is also normally distributed with mean 0 and standard deviation 1.

The normal distribution is:

A random variable X is standardized when each value of X has the mean of X subtracted from it,and the difference is divided by the standard deviation of X.

The standard deviation $\sigma$ Of a probability distribution is a:

Which of the following might not be appropriately modeled with a normal distribution?

The binomial distribution deals with consecutive trials,each of which has two possible outcomes.

Using the standard normal distribution,the Z- score representing the 99th percentile is 2.326.

The Poisson random variable is a discrete random variable with infinitely many possible values.

The number of loan defaults per month at a bank is Poisson distributed.

Introduction to Data Analysis and Decision Making

Describing the Distribution of a Single Variable

Finding Relationships Among Variables

Probability and Probability Distributions

Decision Making Under Uncertainty

Sampling and Sampling Distributions

Confidence Interval Estimation

Hypothesis Testing

Regression Analysis: Estimating Relationships

Regression Analysis: Statistical Inference

Time Series Analysis and Forecasting

Introduction to Optimization Modeling

Optimization Models

Introduction to Simulation Modeling

Simulation Models

Data Mining

Importing Data Into Excel

Analysis of Variance and Experimental Design

Statistical Process Control

Filters

Exam 5: Normal, Binomial, Poisson, and Exponential Distributions

Using the standard normal curve,the Z- score representing the 75th percentile is 0.674.

Given that the random variable X is normally distributed with a mean of 80 and a standard deviation of 10,P(85 11ea936b_b5ad_521a_b28d_990181381f2c_TB13 6_11X ≤\leq≤ 90)is

The binomial distribution is a discrete distribution that deals with a sequence of identical trials,each of which has only two possible outcomes.

The Poisson distribution is applied to events for which the probability of occurrence over a given span of time,space,or distance is very small.

A continuous probability distribution is characterized by:

The Poisson probability distribution is one of the most commonly used continuous probability distributions.

If the random variable X is normally distributed with mean μ\muμ and standard deviation σ\sigmaσ ,then the random variable Z defined by Z=(X−μ)/σZ = ( X - \mu ) / \sigmaZ=(X−μ)/σ is also normally distributed with mean 0 and standard deviation 1.

The normal distribution is:

A random variable X is standardized when each value of X has the mean of X subtracted from it,and the difference is divided by the standard deviation of X.

The standard deviation σ\sigmaσ Of a probability distribution is a:

Which of the following might not be appropriately modeled with a normal distribution?

The binomial distribution deals with consecutive trials,each of which has two possible outcomes.

Using the standard normal distribution,the Z- score representing the 99th percentile is 2.326.

The Poisson random variable is a discrete random variable with infinitely many possible values.

The number of loan defaults per month at a bank is Poisson distributed.

Introduction to Data Analysis and Decision Making

Describing the Distribution of a Single Variable

Finding Relationships Among Variables

Probability and Probability Distributions

Decision Making Under Uncertainty

Sampling and Sampling Distributions

Confidence Interval Estimation

Hypothesis Testing

Regression Analysis: Estimating Relationships

Regression Analysis: Statistical Inference

Time Series Analysis and Forecasting

Introduction to Optimization Modeling

Optimization Models

Introduction to Simulation Modeling

Simulation Models

Data Mining

Importing Data Into Excel

Analysis of Variance and Experimental Design

Statistical Process Control

Filters

Given that the random variable X is normally distributed with a mean of 80 and a standard deviation of 10,P(85 11ea936b_b5ad_521a_b28d_990181381f2c_TB13 6_11X $\leq$ 90)is

If the random variable X is normally distributed with mean $\mu$ and standard deviation $\sigma$ ,then the random variable Z defined by $Z = ( X - \mu ) / \sigma$ is also normally distributed with mean 0 and standard deviation 1.

The standard deviation $\sigma$ Of a probability distribution is a: