Question 1

If we sample with replacement from a finite population,the sampling distribution of the sample proportion follows the ________.

Accepted Answer

A) binomial distribution 
B) uniform distribution 
C) normal distribution 
D) chi-square distribution 
A) binomial distribution 
B) uniform distribution 
C) normal distribution 
D) chi-square distribution

Question 2

The margin of error for a prediction interval is larger than the corresponding value for confidence intervals because ________.

Accepted Answer

A) the distribution of the random variable is a standard normal distribution 
B) evaluating a true proportion requires a larger margin of error 
C) the variability of the new observation around the mean is accounted for 
D) this new value is from the same population 
A) the distribution of the random variable is a standard normal distribution 
B) evaluating a true proportion requires a larger margin of error 
C) the variability of the new observation around the mean is accounted for 
D) this new value is from the same population

Question 3

What is the finite population correction factor and when should it be used?

Accepted Answer

If the sample size,n,is larger than 5% o

Question 4

Statisticians have determined that in order for the calculation of sample variance to result in an unbiased estimate,the denominator in the formula must be ________.

Accepted Answer

A) n - 1 
B) n 
C) n   
D) n + 1 
A) n - 1 
B) n 
C) n   
D) n + 1

Question 5

Given that a sample of size 60 and a population standard deviation of 1.3,what would be the margin of error at a 95% level of confidence?

Accepted Answer

A) ±0.01 
B) ±3.29 
C) ±0.33 
D) ±0.4452 
A) ±0.01 
B) ±3.29 
C) ±0.33 
D) ±0.4452

Question 6

Find the standard error of the mean when the population standard deviation is 14.1 and a sample of size 33 is taken.

Accepted Answer

A) 8.79 
B) 0.43 
C) 2.34 
D) 2.45 
A) 8.79 
B) 0.43 
C) 2.34 
D) 2.45

Question 7

A point estimate ________.

Accepted Answer

A) has a known measurement error 
B) can be found by dividing the population parameter by the sample size 
C) accurately estimates the population parameter 
D) is a sample-based estimate of a population parameter 
A) has a known measurement error 
B) can be found by dividing the population parameter by the sample size 
C) accurately estimates the population parameter 
D) is a sample-based estimate of a population parameter

Question 8

When using 95% confidence intervals for a population mean ________.

Accepted Answer

A) from 100 sample-based intervals,there would be 95 different sample means 
B) 95% of any number of sample-based intervals will contain the population mean 
C) not more than 5% of the confidence intervals should be sampled 
D) of 100 sample-based intervals,95 would contain the true population mean 
A) from 100 sample-based intervals,there would be 95 different sample means 
B) 95% of any number of sample-based intervals will contain the population mean 
C) not more than 5% of the confidence intervals should be sampled 
D) of 100 sample-based intervals,95 would contain the true population mean

Question 9

Find the standard error of the mean when the population standard deviation is 160 and a sample of size 16 is taken.

Accepted Answer

A) 0.14 
B) 40 
C) 1.26 
D) 10 
A) 0.14 
B) 40 
C) 1.26 
D) 10

Question 10

A sampling plan ________.

Accepted Answer

A) states the design quality for production managers 
B) describes the characteristics of a population 
C) is used when the product or process is not well understood 
D) describes the approach that will be used to obtain samples from a population 
A) states the design quality for production managers 
B) describes the characteristics of a population 
C) is used when the product or process is not well understood 
D) describes the approach that will be used to obtain samples from a population

Question 11

In simple random sampling ________.

Accepted Answer

A) every subset has an equal chance of being selected 
B) sampling is taken from the most easily available segments of the population 
C) every nth item is selected from the population 
D) weights are assigned to each value based on the probability that it will be included in the sample 
A) every subset has an equal chance of being selected 
B) sampling is taken from the most easily available segments of the population 
C) every nth item is selected from the population 
D) weights are assigned to each value based on the probability that it will be included in the sample

Question 12

Use the Microsoft Excel function CONFIDENCE.NORM to find the confidence interval for a population mean of $19 at a 95% level of confidence with a sample size of 12 and standard deviation of $1.8.

Accepted Answer

A) $17.98 to $20.02 
B) $18.97 to $19.03 
C) -$4.52 to $42.52 
D) $17.20 to $20.80 
A) $17.98 to $20.02 
B) $18.97 to $19.03 
C) -$4.52 to $42.52 
D) $17.20 to $20.80

Question 13

Find the standard error of the mean when the population standard deviation is 4.1 and a sample of size 30 is taken.

Accepted Answer

A) 7.32 
B) 0.08 
C) 1.34 
D) 0.75 
A) 7.32 
B) 0.08 
C) 1.34 
D) 0.75

Question 14

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.Find the probability that the mean purchase from a sample of 16 customers will be greater than $40.Use the Microsoft Excel function NORM.DIST.

Accepted Answer

A) 2.28% 
B) 69.15% 
C) 100.00% 
D) 97.73% 
A) 2.28% 
B) 69.15% 
C) 100.00% 
D) 97.73%

Question 15

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 sell used equipment will be paid between $20 and $40.

Accepted Answer

A) 66.87% 
B) 71.42% 
C) 33.13% 
D) 28.58% 
A) 66.87% 
B) 71.42% 
C) 33.13% 
D) 28.58%

Question 16

The unbiased estimator of population proportion where there are only two possible outcomes is the ________.

Accepted Answer

A) sample proportion 
B) sample mean 
C) sample percentage 
D) sample size 
A) sample proportion 
B) sample mean 
C) sample percentage 
D) sample size

Question 17

Sampling error depends on the size of the sample relative to the population and is inherent in any sampling process.

Accepted Answer

A) True 
 B)False

Question 18

Given that a sample of size 32 and a population standard deviation of 0.3,what would be the margin of error at a 90% level of confidence?

Accepted Answer

A) ±0.9186 
B) ±1.018 
C) ±0.4452 
D) ±0.09 
A) ±0.9186 
B) ±1.018 
C) ±0.4452 
D) ±0.09

Question 19

A sample of twenty boxes of breakfast cereal delivers a mean weight of 14.9 ounces with a sample standard deviation of 0.3 ounces.Since the label weight of these boxes is 15 ounces,the quality assurance department wants to determine if there is a true weight problem,so they determine the confidence interval at 95% confidence to be ________.

Accepted Answer

A) 14.77 - 15.03 ounces 
B) 14.70 - 15.10 ounces 
C) 14.87 - 14.93 ounces 
D) 14.6 - 15.2 ounces 
A) 14.77 - 15.03 ounces 
B) 14.70 - 15.10 ounces 
C) 14.87 - 14.93 ounces 
D) 14.6 - 15.2 ounces

Question 20

A major consumer products company wants to measure the quality of the packaging of their products on the store shelves.Five large cities are chosen in different parts of the country.What sampling method is being used for this sampling plan?

Accepted Answer

A) simple random sampling 
B) continuous sampling 
C) subjective sampling 
D) stratified sampling 
A) simple random sampling 
B) continuous sampling 
C) subjective sampling 
D) stratified sampling

If we sample with replacement from a finite population,the sampling distribution of the sample proportion follows the ________.

The margin of error for a prediction interval is larger than the corresponding value for confidence intervals because ________.

What is the finite population correction factor and when should it be used?

Statisticians have determined that in order for the calculation of sample variance to result in an unbiased estimate,the denominator in the formula must be ________.

Given that a sample of size 60 and a population standard deviation of 1.3,what would be the margin of error at a 95% level of confidence?

Find the standard error of the mean when the population standard deviation is 14.1 and a sample of size 33 is taken.

A point estimate ________.

When using 95% confidence intervals for a population mean ________.

Find the standard error of the mean when the population standard deviation is 160 and a sample of size 16 is taken.

A sampling plan ________.

In simple random sampling ________.

Use the Microsoft Excel function CONFIDENCE.NORM to find the confidence interval for a population mean of $19 at a 95% level of confidence with a sample size of 12 and standard deviation of $1.8.

Find the standard error of the mean when the population standard deviation is 4.1 and a sample of size 30 is taken.

The unbiased estimator of population proportion where there are only two possible outcomes is the ________.

Sampling error depends on the size of the sample relative to the population and is inherent in any sampling process.

Given that a sample of size 32 and a population standard deviation of 0.3,what would be the margin of error at a 90% level of confidence?

A major consumer products company wants to measure the quality of the packaging of their products on the store shelves.Five large cities are chosen in different parts of the country.What sampling method is being used for this sampling plan?

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

Exam 4: Sampling and Estimation

If we sample with replacement from a finite population,the sampling distribution of the sample proportion follows the ________.

The margin of error for a prediction interval is larger than the corresponding value for confidence intervals because ________.

What is the finite population correction factor and when should it be used?

Statisticians have determined that in order for the calculation of sample variance to result in an unbiased estimate,the denominator in the formula must be ________.

Given that a sample of size 60 and a population standard deviation of 1.3,what would be the margin of error at a 95% level of confidence?

Find the standard error of the mean when the population standard deviation is 14.1 and a sample of size 33 is taken.

A point estimate ________.

When using 95% confidence intervals for a population mean ________.

Find the standard error of the mean when the population standard deviation is 160 and a sample of size 16 is taken.

A sampling plan ________.

In simple random sampling ________.

Use the Microsoft Excel function CONFIDENCE.NORM to find the confidence interval for a population mean of $19 at a 95% level of confidence with a sample size of 12 and standard deviation of $1.8.

Find the standard error of the mean when the population standard deviation is 4.1 and a sample of size 30 is taken.

The unbiased estimator of population proportion where there are only two possible outcomes is the ________.

Sampling error depends on the size of the sample relative to the population and is inherent in any sampling process.

Given that a sample of size 32 and a population standard deviation of 0.3,what would be the margin of error at a 90% level of confidence?

A major consumer products company wants to measure the quality of the packaging of their products on the store shelves.Five large cities are chosen in different parts of the country.What sampling method is being used for this sampling plan?

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