Question 1

Which of the following sampling methods will more likely be susceptible to ethical violation?

Accepted Answer

A)  Simple random sample 
B)  Cluster sample 
C)  Convenience sample 
D)  Stratified sample 
A)  Simple random sample 
B)  Cluster sample 
C)  Convenience sample 
D)  Stratified sample

Question 2

Sampling error can be reduced by taking larger sample sizes.

Accepted Answer

A) True 
 B)False

Question 3

A sample of 300 subscribers to a particular magazine is selected from a population frame of 9,000 subscribers. If, upon examining the data, it is determined that no subscriber had been selected in the sample more than once,

Accepted Answer

A)  the sample could not have been random. 
B)  the sample may have been selected without replacement or with replacement. 
C)  the sample had to have been selected with replacement. 
D)  the sample had to have been selected without replacement. 
A)  the sample could not have been random. 
B)  the sample may have been selected without replacement or with replacement. 
C)  the sample had to have been selected with replacement. 
D)  the sample had to have been selected without replacement.

Question 4

Sampling error can be completely eliminated by taking larger sample sizes.

Accepted Answer

A) True 
 B)False

Question 5

The standard error of the mean is also known as the standard deviation of the sampling distribution of the sample mean.

Accepted Answer

A) True 
 B)False

Question 6

A manufacturer of power tools claims that the average amount of time required to assemble their top-of-the-line table saw is 80 minutes with a standard deviation of 40 minutes. Suppose a random sample of 64 purchasers of this table saw is taken. The probability that the sample mean will be between 77 and 89 minutes is ________.

Accepted Answer

The answer of A manufacturer of power tools claims that...

Question 7

Suppose μ = 50 and σ2 = 100 for a population. In a sample where n = 100 is randomly taken, 90% of all possible sample means will fall between 49 and 51.

Accepted Answer

A) True 
 B)False

Question 8

TABLE 7-4
According to a survey, only 15% of customers who visited the web site of a major retail store made a purchase. Random samples of size 50 are selected.
-Referring to Table 7-4, what is the probability that a random sample of 50 will have at least 30% of customers who will make a purchase after visiting the web site?

Accepted Answer

The answer of TABLE 7-4
According to a survey, only 15%...

Question 9

A telemarketer set the company's computerized dialing system to contact every 25th person listed in the local telephone directory. What sampling method was used?

Accepted Answer

A)  simple random sample 
B)  systematic sample 
C)  stratified sample 
D)  cluster sample 
A)  simple random sample 
B)  systematic sample 
C)  stratified sample 
D)  cluster sample

Question 10

To estimate the average number of hours a student at a major university spent in the library, a researcher obtained the list of students from the registrar's office, from which she can draw a random sample 200 students. This list is a ________.

Accepted Answer

The answer of To estimate the average number of hours...

Question 11

Which of the following is true regarding the sampling distribution of the mean for a large sample size?

Accepted Answer

A)  It has the same shape, mean, and standard deviation as the population. 
B)  It has a normal distribution with the same mean and standard deviation as the population. 
C)  It has the same shape and mean as the population, but has a smaller standard deviation. 
D)  It has a normal distribution with the same mean as the population but with a smaller standard deviation. 
A)  It has the same shape, mean, and standard deviation as the population. 
B)  It has a normal distribution with the same mean and standard deviation as the population. 
C)  It has the same shape and mean as the population, but has a smaller standard deviation. 
D)  It has a normal distribution with the same mean as the population but with a smaller standard deviation.

Question 12

The sample proportion is an unbiased estimate of the population proportion.

Accepted Answer

A) True 
 B)False

Question 13

Selection bias occurs more frequently in systematic samples than in simple random samples.

Accepted Answer

A) True 
 B)False

Question 14

The amount of bleach a machine pours into bottles has a mean of 36 oz. with a standard deviation of 0.15 oz. Suppose we take a random sample of 36 bottles filled by this machine. The sampling distribution of the sample mean has a standard error of 0.15.

Accepted Answer

A) True 
 B)False

Question 15

As the size of the sample is increased, the standard deviation of the sampling distribution of the sample mean for a normally distributed population will stay the same.

Accepted Answer

A) True 
 B)False

Question 16

The question "Is your household income last year somewhere in between $25,000 and $35,000?" will most likely result in coverage error.

Accepted Answer

A) True 
 B)False

Question 17

The average score of all pro golfers for a particular course has a mean of 70 and a standard deviation of 3.0. Suppose 36 golfers played the course today. Find the probability that the average score of the 36 golfers exceeded 71.

Accepted Answer

The answer of The average score of all pro golfers...

Question 18

The amount of bleach a machine pours into bottles has a mean of 36 oz. with a standard deviation of 0.15 oz. Suppose we take a random sample of 36 bottles filled by this machine. The sampling distribution of the sample mean has a mean of 36 oz.

Accepted Answer

A) True 
 B)False

Question 19

TABLE 7-4
According to a survey, only 15% of customers who visited the web site of a major retail store made a purchase. Random samples of size 50 are selected.
-Referring to Table 7-4, 90% of the samples will have less than what percentage of customers who will make a purchase after visiting the web site?

Accepted Answer

The answer of TABLE 7-4
According to a survey, only 15%...

Question 20

For a population frame containing N = 1,007 individuals, what code number should you assign to the first person on the list in order to use a table of random numbers?

Accepted Answer

A)  0 
B)  1 
C)  01 
D)  0001 
A)  0 
B)  1 
C)  01 
D)  0001

Which of the following sampling methods will more likely be susceptible to ethical violation?

Sampling error can be reduced by taking larger sample sizes.

A sample of 300 subscribers to a particular magazine is selected from a population frame of 9,000 subscribers. If, upon examining the data, it is determined that no subscriber had been selected in the sample more than once,

Sampling error can be completely eliminated by taking larger sample sizes.

The standard error of the mean is also known as the standard deviation of the sampling distribution of the sample mean.

Suppose μ = 50 and σ² = 100 for a population. In a sample where n = 100 is randomly taken, 90% of all possible sample means will fall between 49 and 51.

A telemarketer set the company's computerized dialing system to contact every 25th person listed in the local telephone directory. What sampling method was used?

To estimate the average number of hours a student at a major university spent in the library, a researcher obtained the list of students from the registrar's office, from which she can draw a random sample 200 students. This list is a ________.

Which of the following is true regarding the sampling distribution of the mean for a large sample size?

The sample proportion is an unbiased estimate of the population proportion.

Selection bias occurs more frequently in systematic samples than in simple random samples.

The amount of bleach a machine pours into bottles has a mean of 36 oz. with a standard deviation of 0.15 oz. Suppose we take a random sample of 36 bottles filled by this machine. The sampling distribution of the sample mean has a standard error of 0.15.

As the size of the sample is increased, the standard deviation of the sampling distribution of the sample mean for a normally distributed population will stay the same.

The question "Is your household income last year somewhere in between $25,000 and $35,000?" will most likely result in coverage error.

The average score of all pro golfers for a particular course has a mean of 70 and a standard deviation of 3.0. Suppose 36 golfers played the course today. Find the probability that the average score of the 36 golfers exceeded 71.

The amount of bleach a machine pours into bottles has a mean of 36 oz. with a standard deviation of 0.15 oz. Suppose we take a random sample of 36 bottles filled by this machine. The sampling distribution of the sample mean has a mean of 36 oz.

For a population frame containing N = 1,007 individuals, what code number should you assign to the first person on the list in order to use a table of random numbers?

Instruction and Data Collection

Presenting Data in Tables and Charts

Numerical Descriptive Measures

Basic Probability

Some Important Discrete Probability Distributions

The Normal Distribution and Other Continuous Distributions

Confidence Interval Estimation

Fundamentals of Hypothesis Testing: One-Sample Tests

Two-Sample Tests

Analysis of Variance

Chi-Square Tests and Nonparametric Tests

Simple Linear Regression

Introduction to Multiple Regression

Multiple Regression Model Building

Time-Series Analysis and Index Numbers

Statistical Applications in Quality Management

Data Analysis Overview

Filters

Exam 7: Sampling and Sampling Distributions

Which of the following sampling methods will more likely be susceptible to ethical violation?

Sampling error can be reduced by taking larger sample sizes.

A sample of 300 subscribers to a particular magazine is selected from a population frame of 9,000 subscribers. If, upon examining the data, it is determined that no subscriber had been selected in the sample more than once,

Sampling error can be completely eliminated by taking larger sample sizes.

The standard error of the mean is also known as the standard deviation of the sampling distribution of the sample mean.

Suppose μ = 50 and σ2 = 100 for a population. In a sample where n = 100 is randomly taken, 90% of all possible sample means will fall between 49 and 51.

A telemarketer set the company's computerized dialing system to contact every 25th person listed in the local telephone directory. What sampling method was used?

To estimate the average number of hours a student at a major university spent in the library, a researcher obtained the list of students from the registrar's office, from which she can draw a random sample 200 students. This list is a ________.

Which of the following is true regarding the sampling distribution of the mean for a large sample size?

The sample proportion is an unbiased estimate of the population proportion.

Selection bias occurs more frequently in systematic samples than in simple random samples.

The amount of bleach a machine pours into bottles has a mean of 36 oz. with a standard deviation of 0.15 oz. Suppose we take a random sample of 36 bottles filled by this machine. The sampling distribution of the sample mean has a standard error of 0.15.

As the size of the sample is increased, the standard deviation of the sampling distribution of the sample mean for a normally distributed population will stay the same.

The question "Is your household income last year somewhere in between $25,000 and $35,000?" will most likely result in coverage error.

The average score of all pro golfers for a particular course has a mean of 70 and a standard deviation of 3.0. Suppose 36 golfers played the course today. Find the probability that the average score of the 36 golfers exceeded 71.

The amount of bleach a machine pours into bottles has a mean of 36 oz. with a standard deviation of 0.15 oz. Suppose we take a random sample of 36 bottles filled by this machine. The sampling distribution of the sample mean has a mean of 36 oz.

For a population frame containing N = 1,007 individuals, what code number should you assign to the first person on the list in order to use a table of random numbers?

Instruction and Data Collection

Presenting Data in Tables and Charts

Numerical Descriptive Measures

Basic Probability

Some Important Discrete Probability Distributions

The Normal Distribution and Other Continuous Distributions

Confidence Interval Estimation

Fundamentals of Hypothesis Testing: One-Sample Tests

Two-Sample Tests

Analysis of Variance

Chi-Square Tests and Nonparametric Tests

Simple Linear Regression

Introduction to Multiple Regression

Multiple Regression Model Building

Time-Series Analysis and Index Numbers

Statistical Applications in Quality Management

Data Analysis Overview

Filters

Suppose μ = 50 and σ² = 100 for a population. In a sample where n = 100 is randomly taken, 90% of all possible sample means will fall between 49 and 51.