Question 1

The formula to find a confidence interval to estimate the total of a population is most like the formula for the ________.

Accepted Answer

A) confidence interval for mean when the population standard deviation is known 
B) confidence interval for proportion 
C) confidence interval for standard deviation 
D) confidence interval for mean when the population standard deviation is unknown 
A) confidence interval for mean when the population standard deviation is known 
B) confidence interval for proportion 
C) confidence interval for standard deviation 
D) confidence interval for mean when the population standard deviation is unknown

Question 2

Sampling from a continuous process ________.

Accepted Answer

A) does not involve a trade-off between cost and information obtained 
B) should be used only as a last resort as it requires a large amount of resources 
C) introduces two types of sampling error called α and β 
D) can be accomplished by selecting a random time for n items to be collected 
A) does not involve a trade-off between cost and information obtained 
B) should be used only as a last resort as it requires a large amount of resources 
C) introduces two types of sampling error called α and β 
D) can be accomplished by selecting a random time for n items to be collected

Question 3

The standard error of the mean is found by dividing the population standard deviation by the square root of the sample size.

Accepted Answer

A) True 
 B)False

Question 4

Is it likely that the population mean weight for a large batch of chickens is 3.5 pounds when a sample size of 35 yields a sample mean weight of 3.3 pounds? The population standard deviation for this breed of chicken is known to be 0.22 pounds.Use a 95% confidence interval.

Accepted Answer

No,it is not likely.3.5 pounds

Question 5

The finite population correction factor (FPC)is found by ________.

Accepted Answer

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

Question 6

The sampling distribution of the mean is ________.

Accepted Answer

A) always symmetrical 
B) a distribution of the probabilities of estimating the population mean accurately through sampling 
C) the distribution of all the values in the sample 
D) the distribution of the means of all possible samples of a fixed sample size n from some population 
A) always symmetrical 
B) a distribution of the probabilities of estimating the population mean accurately through sampling 
C) the distribution of all the values in the sample 
D) the distribution of the means of all possible samples of a fixed sample size n from some population

Question 7

A confidence interval using the known population standard deviation ________.

Accepted Answer

A) is the same as the point estimate for the population standard deviation 
B) has the least sampling error compared to confidence intervals for mean 
C) is the simplest type of confidence interval 
D) uses only the 95% level of confidence 
A) is the same as the point estimate for the population standard deviation 
B) has the least sampling error compared to confidence intervals for mean 
C) is the simplest type of confidence interval 
D) uses only the 95% level of confidence

Question 8

Given that a sample of size 12 was taken from a finite population of 60 with a population standard deviation of 1.8,what would be the margin of error at a 95% level of confidence?

Accepted Answer

A) ±1.018 
B) ±0.9186 
C) ±12.22 
D) ±0.4452 
A) ±1.018 
B) ±0.9186 
C) ±12.22 
D) ±0.4452

Question 9

Given that a sample of size 32 was taken from a finite population of 90 with a population standard deviation of 1.8,what would be the margin of error at a 95% level of confidence?

Accepted Answer

A) ±0.237 
B) ±1.262 
C) ±0.4452 
D) ±0.822 
A) ±0.237 
B) ±1.262 
C) ±0.4452 
D) ±0.822

Question 10

A sample mean of 4.56 ounces was just measured from a population of which the population mean is not known.What value should be used for the population mean?

Accepted Answer

A) 2.125 ounces 
B) none,since the population mean cannot be estimated 
C) 4.56 ounces 
D) the average of all the sample means 
A) 2.125 ounces 
B) none,since the population mean cannot be estimated 
C) 4.56 ounces 
D) the average of all the sample means

Question 11

Why is the z value component of the margin of error based on   ?

Accepted Answer

The α value is divided in half before it

Question 12

The t-distribution is very much like the standard normal distribution except that the t-distribution ________.

Accepted Answer

A) has a smaller variance 
B) has a smaller standard deviation 
C) is bi-symmetrical 
D) has a larger variance 
A) has a smaller variance 
B) has a smaller standard deviation 
C) is bi-symmetrical 
D) has a larger variance

Question 13

Peak Previously Played Picks buys and sells used sports equipment.For the past year,the mean purchase of used sports equipment was $36 with a standard deviation of $8.Using the Microsoft Excel function NORM.DIST,find the probability that the next person who comes in to buy used equipment will pay more than $40.

Accepted Answer

A) 30.85% 
B) 69.15% 
C) 24.20% 
D) 95.60% 
A) 30.85% 
B) 69.15% 
C) 24.20% 
D) 95.60%

Question 14

In designing a sampling plan,the population frame is ________.

Accepted Answer

A) the objectives of the sampling activity 
B) the target population 
C) the list from which the sample is selected 
D) the sampling procedures 
A) the objectives of the sampling activity 
B) the target population 
C) the list from which the sample is selected 
D) the sampling procedures

Question 15

Find the confidence interval for a population mean of 615 acres at a 90% level of confidence with a sample size of 52 and standard deviation of 27 acres.

Accepted Answer

A) 189 to 1190 acres 
B) 608.84 to 621.16 acres 
C) 452 to 4252 acres 
D) 172 to 2008 acres 
A) 189 to 1190 acres 
B) 608.84 to 621.16 acres 
C) 452 to 4252 acres 
D) 172 to 2008 acres

Question 16

What could cause a sample mean to be a poor point estimate of the population mean?

Accepted Answer

A) a small sample including several values at the high end of the population range 
B) a small,homogeneous sample from the population 
C) the sample standard deviation is large 
D) the sample standard deviation is small 
A) a small sample including several values at the high end of the population range 
B) a small,homogeneous sample from the population 
C) the sample standard deviation is large 
D) the sample standard deviation is small

Question 17

A point estimate of a population mean is always more precise than a point estimate of a population standard deviation.

Accepted Answer

A) True 
 B)False

Question 18

Different t-distributions are determined by ________.

Accepted Answer

A) the height of the distribution 
B) the number of peaks 
C) different degrees of freedom 
D) different populations 
A) the height of the distribution 
B) the number of peaks 
C) different degrees of freedom 
D) different populations

Question 19

Find the confidence interval for a population mean of 1.6 pounds at a 95% level of confidence with a sample size of 112 and standard deviation of 0.2 pounds.

Accepted Answer

A) 1.89 to 1.90 pounds 
B) 4.52 to 42.52 pounds 
C) 1.56 to 1.64 pounds 
D) 1.72 to 2.08 pounds 
A) 1.89 to 1.90 pounds 
B) 4.52 to 42.52 pounds 
C) 1.56 to 1.64 pounds 
D) 1.72 to 2.08 pounds

Question 20

A recent political poll for a pending presidential election gave a 90% confidence interval for the population proportion of 0.485 to 0.505 for candidate A.What conclusion can be drawn from this information?

Accepted Answer

A) Candidate A may win the election but the sampling error is too large to make a firm prediction. 
B) Candidate A should win the election since 0.5 is in the confidence interval. 
C) There is a 90% likelihood that candidate A will win the election. 
D) There is only a 0.495 chance that candidate A will win the election. 
A) Candidate A may win the election but the sampling error is too large to make a firm prediction. 
B) Candidate A should win the election since 0.5 is in the confidence interval. 
C) There is a 90% likelihood that candidate A will win the election. 
D) There is only a 0.495 chance that candidate A will win the election.

The formula to find a confidence interval to estimate the total of a population is most like the formula for the ________.

Sampling from a continuous process ________.

The standard error of the mean is found by dividing the population standard deviation by the square root of the sample size.

Is it likely that the population mean weight for a large batch of chickens is 3.5 pounds when a sample size of 35 yields a sample mean weight of 3.3 pounds? The population standard deviation for this breed of chicken is known to be 0.22 pounds.Use a 95% confidence interval.

The finite population correction factor (FPC)is found by ________.

The sampling distribution of the mean is ________.

A confidence interval using the known population standard deviation ________.

Given that a sample of size 12 was taken from a finite population of 60 with a population standard deviation of 1.8,what would be the margin of error at a 95% level of confidence?

Given that a sample of size 32 was taken from a finite population of 90 with a population standard deviation of 1.8,what would be the margin of error at a 95% level of confidence?

A sample mean of 4.56 ounces was just measured from a population of which the population mean is not known.What value should be used for the population mean?

Why is the z value component of the margin of error based on ?

The t-distribution is very much like the standard normal distribution except that the t-distribution ________.

In designing a sampling plan,the population frame is ________.

Find the confidence interval for a population mean of 615 acres at a 90% level of confidence with a sample size of 52 and standard deviation of 27 acres.

What could cause a sample mean to be a poor point estimate of the population mean?

A point estimate of a population mean is always more precise than a point estimate of a population standard deviation.

Different t-distributions are determined by ________.

Find the confidence interval for a population mean of 1.6 pounds at a 95% level of confidence with a sample size of 112 and standard deviation of 0.2 pounds.

A recent political poll for a pending presidential election gave a 90% confidence interval for the population proportion of 0.485 to 0.505 for candidate A.What conclusion can be drawn from this information?

Data and Business Decisions

Descriptive Statistics and Data Analysis

Probability Concepts and Distributions

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 4: Sampling and Estimation

The formula to find a confidence interval to estimate the total of a population is most like the formula for the ________.

Sampling from a continuous process ________.

The standard error of the mean is found by dividing the population standard deviation by the square root of the sample size.

Is it likely that the population mean weight for a large batch of chickens is 3.5 pounds when a sample size of 35 yields a sample mean weight of 3.3 pounds? The population standard deviation for this breed of chicken is known to be 0.22 pounds.Use a 95% confidence interval.

The finite population correction factor (FPC)is found by ________.

The sampling distribution of the mean is ________.

A confidence interval using the known population standard deviation ________.

Given that a sample of size 12 was taken from a finite population of 60 with a population standard deviation of 1.8,what would be the margin of error at a 95% level of confidence?

Given that a sample of size 32 was taken from a finite population of 90 with a population standard deviation of 1.8,what would be the margin of error at a 95% level of confidence?

A sample mean of 4.56 ounces was just measured from a population of which the population mean is not known.What value should be used for the population mean?

Why is the z value component of the margin of error based on ?

The t-distribution is very much like the standard normal distribution except that the t-distribution ________.

In designing a sampling plan,the population frame is ________.

Find the confidence interval for a population mean of 615 acres at a 90% level of confidence with a sample size of 52 and standard deviation of 27 acres.

What could cause a sample mean to be a poor point estimate of the population mean?

A point estimate of a population mean is always more precise than a point estimate of a population standard deviation.

Different t-distributions are determined by ________.

Find the confidence interval for a population mean of 1.6 pounds at a 95% level of confidence with a sample size of 112 and standard deviation of 0.2 pounds.

A recent political poll for a pending presidential election gave a 90% confidence interval for the population proportion of 0.485 to 0.505 for candidate A.What conclusion can be drawn from this information?

Data and Business Decisions

Descriptive Statistics and Data Analysis

Probability Concepts and Distributions

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