Question 1

The following data was collected from a simple random sample of a population. 13 15 14 16 12
The mean of the population

Accepted Answer

A) is 14 
B) is 15 
C) is 15.1581 
D) could be any value 
A) is 14 
B) is 15 
C) is 15.1581 
D) could be any value

Question 2

The standard deviation of a sample of 100 elements taken from a very large population is determined to be 60. The variance of the population

Accepted Answer

A) can not be larger than 60 
B) can not be larger than 3600 
C) must be at least 100 
D) can be any value greater or equal to zero 
A) can not be larger than 60 
B) can not be larger than 3600 
C) must be at least 100 
D) can be any value greater or equal to zero

Question 3

A random sample of ten examination papers in a course that was given on a pass or fail basis showed the following scores.   
a.What is the point estimate for the mean of the population?
b.What is the point estimate for the standard deviation of the population?
c.What is the point estimate for the proportion of all students who passed the course?

Accepted Answer

The answer of A random sample of ten examination papers...

Question 4

From a population of 200 elements, a sample of 49 elements is selected. It is determined that the sample mean is 56 and the sample standard deviation is 14. The standard error of the mean is

Accepted Answer

A) 3 
B) 2 
C) greater than 2 
D) less than 2 
A) 3 
B) 2 
C) greater than 2 
D) less than 2

Question 5

The number of different simple random samples of size 5 that can be selected from a population of size 8 is

Accepted Answer

A) 40 
B) 336 
C) 13 
D) 56 
A) 40 
B) 336 
C) 13 
D) 56

Question 6

Consider a population of five families with the following data representing the number of pets in each family.
 
a.Determine the mean and the variance of the population.
b.There are ten possible samples of size 2 (sampling without replacement). List the 10 possible samples of size 2, and determine the mean of each sample.
c.Using the ten sample mean values, compute the mean and the standard error of the mean.

Accepted Answer

The answer of Consider a population of five families with...

Question 7

A theorem that allows us to use the normal probability distribution to approximate the sampling distribution of sample means and sample proportions whenever the sample size is large is known as the

Accepted Answer

A) approximation theorem 
B) normal probability theorem 
C) central limit theorem 
D) central normality theorem 
A) approximation theorem 
B) normal probability theorem 
C) central limit theorem 
D) central normality theorem

Question 8

Starting salaries of a sample of five management majors along with their genders are shown below.   
a.What is the point estimate for the starting salaries of all management majors?
b.Determine the point estimate for the variance of the population.
c.Determine the point estimate for the proportion of male employees.

Accepted Answer

a.25 (thou

Question 9

Which of the following is an example of nonprobabilistic sampling?

Accepted Answer

A) simple random sampling 
B) stratified simple random sampling 
C) cluster sampling 
D) judgment sampling 
A) simple random sampling 
B) stratified simple random sampling 
C) cluster sampling 
D) judgment sampling

Question 10

MNM Corporation gives each of its employees an aptitude test. The scores on the test are normally distributed with a mean of 75 and a standard deviation of 15. A simple random sample of 25 is taken from a population of 500.
a.What are the expected value, the standard deviation, and the shape of the sampling distribution of   ? 
b.What is the probability that the average aptitude test in the sample will be between 70.14 and 82.14?
c.What is the probability that the average aptitude test in the sample will be greater than 82.68?
d.What is the probability that the average aptitude test in the sample will be less than 78.69?
e.Find a value, C, such that P(     C) = .015.

Accepted Answer

a.75; 3; normal
b.0.

Question 11

The following data was collected from a simple random sample of a population. 13 15 14 16 12
If the population consisted of 10 elements, how many different random samples of size 6 could be drawn from the population?

Accepted Answer

A) 60 
B) 210 
C) 3024 
D) 362880 
A) 60 
B) 210 
C) 3024 
D) 362880

Question 12

There are 8,000 students at the University of Tennessee at Chattanooga. The average age of all the students is 24 years with a standard deviation of 9 years. A random sample of 36 students is selected.
a.Determine the standard error of the mean.
b.What is the probability that the sample mean will be larger than 19.5?
c.What is the probability that the sample mean will be between 25.5 and 27 years?

Accepted Answer

a.1.5
b.0.

Question 13

Four hundred people were asked whether gun laws should be more stringent. Three hundred said "yes," and 100 said "no." The point estimate of the proportion in the population who will respond "yes" is

Accepted Answer

A) 300 
B) approximately 300 
C) 0.75 
D) 0.25 
A) 300 
B) approximately 300 
C) 0.75 
D) 0.25

Question 14

A simple random sample of 5 observations from a population containing 400 elements was taken, and the following values were obtained.12 18
19
20
21
A point estimate of the mean is

Accepted Answer

A) 400 
B) 18 
C) 20 
D) 10 
A) 400 
B) 18 
C) 20 
D) 10

Question 15

Doubling the size of the sample will

Accepted Answer

A) reduce the standard error of the mean to one-half its current value 
B) reduce the standard error of the mean to approximately 70% of its current value 
C) have no effect on the standard error of the mean 
D) double the standard error of the mean 
A) reduce the standard error of the mean to one-half its current value 
B) reduce the standard error of the mean to approximately 70% of its current value 
C) have no effect on the standard error of the mean 
D) double the standard error of the mean

Question 16

Random samples of size 17 are taken from a population that has 200 elements, a mean of 36, and a standard deviation of 8. Which of the following best describes the form of the sampling distribution of the sample mean for this situation?

Accepted Answer

A) approximately normal because the sample size is small relative to the population size 
B) approximately normal because of the central limit theorem 
C) exactly normal 
D) None of these alternatives is correct. 
A) approximately normal because the sample size is small relative to the population size 
B) approximately normal because of the central limit theorem 
C) exactly normal 
D) None of these alternatives is correct.

Question 17

In a local university, 10% of the students live in the dormitories. A random sample of 100 students is selected for a particular study.
a.What is the probability that the sample proportion (the proportion living in the dormitories) is between 0.172 and 0.178?
b.What is the probability that the sample proportion (the proportion living in the dormitories) is greater than 0.025?

Accepted Answer

The answer of In a local university, 10% of the...

Question 18

Exhibit 7-3
In a local university, 40% of the students live in the dormitories. A random sample of 80 students is selected for a particular study.
-Refer to Exhibit 7-3. The probability that the sample proportion (the proportion living in the dormitories) is between 0.30 and 0.50 is

Accepted Answer

A) 0.4664 
B) 0.9328 
C) 0.0336 
D) 0.0672 
A) 0.4664 
B) 0.9328 
C) 0.0336 
D) 0.0672

Question 19

Cluster sampling is

Accepted Answer

A) a nonprobability sampling method 
B) the same as convenience sampling 
C) a probability sampling method 
D) None of these alternatives is correct. 
A) a nonprobability sampling method 
B) the same as convenience sampling 
C) a probability sampling method 
D) None of these alternatives is correct.

Question 20

The purpose of statistical inference is to provide information about the

Accepted Answer

A) sample based upon information contained in the population 
B) population based upon information contained in the sample 
C) population based upon information contained in the population 
D) mean of the sample based upon the mean of the population 
A) sample based upon information contained in the population 
B) population based upon information contained in the sample 
C) population based upon information contained in the population 
D) mean of the sample based upon the mean of the population

The following data was collected from a simple random sample of a population. 13 15 14 16 12 The mean of the population

The standard deviation of a sample of 100 elements taken from a very large population is determined to be 60. The variance of the population

From a population of 200 elements, a sample of 49 elements is selected. It is determined that the sample mean is 56 and the sample standard deviation is 14. The standard error of the mean is

The number of different simple random samples of size 5 that can be selected from a population of size 8 is

A theorem that allows us to use the normal probability distribution to approximate the sampling distribution of sample means and sample proportions whenever the sample size is large is known as the

Which of the following is an example of nonprobabilistic sampling?

The following data was collected from a simple random sample of a population. 13 15 14 16 12 If the population consisted of 10 elements, how many different random samples of size 6 could be drawn from the population?

Four hundred people were asked whether gun laws should be more stringent. Three hundred said "yes," and 100 said "no." The point estimate of the proportion in the population who will respond "yes" is

A simple random sample of 5 observations from a population containing 400 elements was taken, and the following values were obtained.12 18 19 20 21 A point estimate of the mean is

Doubling the size of the sample will

Random samples of size 17 are taken from a population that has 200 elements, a mean of 36, and a standard deviation of 8. Which of the following best describes the form of the sampling distribution of the sample mean for this situation?

Exhibit 7-3 In a local university, 40% of the students live in the dormitories. A random sample of 80 students is selected for a particular study. -Refer to Exhibit 7-3. The probability that the sample proportion (the proportion living in the dormitories) is between 0.30 and 0.50 is

Cluster sampling is

The purpose of statistical inference is to provide information about the

Data and Statistics

Descriptive Statistics: Tabular and Graphical Displays

Descriptive Statistics: Numerical Measures

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Interval Estimation

Hypothesis Tests

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Comparing Multiple Proportions, Test of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Regression Analysis: Model Building

Time Series Analysis and Forecasting

Nonparametric Methods

Statistical Methods for Quality Control

Index Numbers

Decision Analysis on Website

Sample Survey on Website

Filters

Exam 7: Sampling and Sampling Distributions

The following data was collected from a simple random sample of a population. 13 15 14 16 12 The mean of the population

The standard deviation of a sample of 100 elements taken from a very large population is determined to be 60. The variance of the population

From a population of 200 elements, a sample of 49 elements is selected. It is determined that the sample mean is 56 and the sample standard deviation is 14. The standard error of the mean is

The number of different simple random samples of size 5 that can be selected from a population of size 8 is

A theorem that allows us to use the normal probability distribution to approximate the sampling distribution of sample means and sample proportions whenever the sample size is large is known as the

Which of the following is an example of nonprobabilistic sampling?

The following data was collected from a simple random sample of a population. 13 15 14 16 12 If the population consisted of 10 elements, how many different random samples of size 6 could be drawn from the population?

Four hundred people were asked whether gun laws should be more stringent. Three hundred said "yes," and 100 said "no." The point estimate of the proportion in the population who will respond "yes" is

A simple random sample of 5 observations from a population containing 400 elements was taken, and the following values were obtained.12 18 19 20 21 A point estimate of the mean is

Doubling the size of the sample will

Random samples of size 17 are taken from a population that has 200 elements, a mean of 36, and a standard deviation of 8. Which of the following best describes the form of the sampling distribution of the sample mean for this situation?

Exhibit 7-3 In a local university, 40% of the students live in the dormitories. A random sample of 80 students is selected for a particular study. -Refer to Exhibit 7-3. The probability that the sample proportion (the proportion living in the dormitories) is between 0.30 and 0.50 is

Cluster sampling is

The purpose of statistical inference is to provide information about the

Data and Statistics

Descriptive Statistics: Tabular and Graphical Displays

Descriptive Statistics: Numerical Measures

Introduction to Probability

Discrete Probability Distributions

Continuous Probability Distributions

Interval Estimation

Hypothesis Tests

Inference About Means and Proportions With Two Populations

Inferences About Population Variances

Comparing Multiple Proportions, Test of Independence and Goodness of Fit

Experimental Design and Analysis of Variance

Simple Linear Regression

Multiple Regression

Regression Analysis: Model Building

Time Series Analysis and Forecasting

Nonparametric Methods

Statistical Methods for Quality Control

Index Numbers

Decision Analysis on Website

Sample Survey on Website

Filters