Question 1

________ results from the exclusion of certain groups of subjects from a population frame.

Accepted Answer

The answer of ________ results from the exclusion of certain...

Question 2

True or False: A convenience sample is a type of probability sample.

Accepted Answer

A convenience sample is a non-probability sample because it involves selecting participants who are easiest to reach rather than randomly selecting from the entire population.

Question 3

The sampling process begins by locating appropriate data sources called ___________.

Accepted Answer

The answer of The sampling process begins by locating appropriate...

Question 4

________ results from the failure to collect data on all subjects in the sample.

Accepted Answer

The answer of ________ results from the failure to collect...

Question 5

True or False: The only reliable way a researcher can make statistical inferences from a sample
to a population is to use nonprobability sampling methods.

Accepted Answer

Probability sampling methods are the reliable way to make statistical inferences from a sample to a population because they allow for the calculation of sampling error and ensure that every member of the population has a known chance of being selected.

Question 6

True or False: Sampling error can be reduced by taking larger sample sizes.

Accepted Answer

Sampling error decreases as the sample size increases because larger samples tend to better represent the population, reducing the variability and potential bias in the estimates.

Question 7

True or False: There can be only one sample selected from a population.

Accepted Answer

Multiple samples can be selected from a population, each potentially yielding different results or insights about the population.

Question 8

True or False: If a simple random sample is chosen with replacement, each individual has the
same chance of selection on every selection.

Accepted Answer

In a simple random sample with replacement, each individual is returned to the population after being selected, maintaining the same probability of selection for each draw.

Question 9

True or False: When participants are allowed to self-select into the sample, you have a
nonprobability sample.

Accepted Answer

When participants self-select into a sample, it is a nonprobability sample because not all members of the population have a known or equal chance of being included.

Question 10

True or False: If you randomly select a student from the first row of a business statistics class
and then every other fifth student thereafter until you get a sample of 20 students, this is an
example of a convenience sample.

Accepted Answer

This is an example of a systematic sample, not a convenience sample, because it follows a specific pattern or system for selection.

Question 11

Coverage error results in a ________.

Accepted Answer

The answer of Coverage error results in a ________....

Question 12

True or False: When dealing with human surveys, we are usually interested in sampling with
replacement.

Accepted Answer

In human surveys, we are usually interested in sampling without replacement to ensure that each individual is only surveyed once, providing a more accurate representation of the population.

Question 13

True or False: Sampling error can be completely eliminated by taking larger sample sizes.

Accepted Answer

Sampling error can be reduced by increasing sample size, but it cannot be completely eliminated because it is inherent in the process of taking a sample rather than a full population.

Question 14

True or False: Using different frames to generate data can lead to totally different conclusions.

Accepted Answer

Different frames or perspectives can highlight different aspects of the data, leading to varying interpretations and conclusions.

Question 15

To estimate the mean 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 select a
random sample 200 students.This list is a _______.

Accepted Answer

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

Question 16

True or False: Systematic samples are less efficient than a stratified sample.

Accepted Answer

Systematic sampling can be less efficient than stratified sampling because it may not account for variability within subgroups, whereas stratified sampling ensures representation from each subgroup, leading to potentially more accurate and efficient results.

Question 17

True or False: Items or individuals in a judgment sample are chosen according to their
probability of occurrence.

Accepted Answer

In a judgment sample, items or individuals are selected based on the judgment of the researcher, not their probability of occurrence.

Question 18

True or False: You stand at the main entrance to a departmental store and pick the first 20
customers that enter the store after it has opened its door for business on a single day.This is an
example of a systematic sample.

Accepted Answer

This is an example of a convenience sample, not a systematic sample, as it involves selecting the first available subjects without a specific system or interval.

Question 19

True or False: The professor of a business statistics class wanted to find out the mean amount of
time per week her students spent studying for the class.Among the 50 students in her class, 20%
were freshmen, 50% were sophomores and 30% were juniors.She decided to select 2 students
randomly from the freshmen, 5 randomly from the sophomores and 3 randomly from the juniors.
This is an example of a systematic sample.

Accepted Answer

This is an example of a stratified sample, not a systematic sample. In a stratified sample, the population is divided into subgroups (strata) and random samples are taken from each subgroup.

Question 20

True or False: A sample is always a good representation of the target population.

Accepted Answer

A sample is only a good representation of the target population if it is randomly selected and sufficiently large to capture the diversity of the population. Otherwise, it may be biased or unrepresentative.

Quiz 1: Defining and Collecting Data

________ results from the exclusion of certain groups of subjects from a population frame.

True or False: A convenience sample is a type of probability sample.

The sampling process begins by locating appropriate data sources called ___________.

________ results from the failure to collect data on all subjects in the sample.

True or False: The only reliable way a researcher can make statistical inferences from a sample to a population is to use nonprobability sampling methods.

True or False: Sampling error can be reduced by taking larger sample sizes.

True or False: There can be only one sample selected from a population.

True or False: If a simple random sample is chosen with replacement, each individual has the same chance of selection on every selection.

True or False: When participants are allowed to self-select into the sample, you have a nonprobability sample.

True or False: If you randomly select a student from the first row of a business statistics class and then every other fifth student thereafter until you get a sample of 20 students, this is an example of a convenience sample.

Coverage error results in a ________.

True or False: When dealing with human surveys, we are usually interested in sampling with replacement.

True or False: Sampling error can be completely eliminated by taking larger sample sizes.

True or False: Using different frames to generate data can lead to totally different conclusions.

To estimate the mean 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 select a random sample 200 students.This list is a _______.

True or False: Systematic samples are less efficient than a stratified sample.

True or False: Items or individuals in a judgment sample are chosen according to their probability of occurrence.

True or False: You stand at the main entrance to a departmental store and pick the first 20 customers that enter the store after it has opened its door for business on a single day.This is an example of a systematic sample.

True or False: A sample is always a good representation of the target population.