Question 1

A statistics student found a reference in the campus library that contained the median family
Incomes for all 50 states.She would report her data as being collected using
A) a designed experiment.
B) observational data.
C) a random sample.
D) a published source.

Accepted Answer

The student found the data in a reference from the library, which means it was collected from a published source.

Question 2

Which of the following scenarios will yield a nonprobability sample?
A) The subjects of the sample are chosen on the basis of known probability.
B) Items or individuals are chosen without regard to their probability of occurrence.
C) Every individual or item from the frame has an equal chance of being selected.Selection may be with replacement or without replacement.
D) Decide on a sample size, n; divide the frame of N individuals into groups of k individuals where k = N/n; randomly select one individual from the first group; select every kth
Individual thereafter.

Accepted Answer

Nonprobability sampling occurs when items or individuals are chosen without regard to their probability of occurrence, meaning not every member of the population has a known or equal chance of being selected.

Question 3

A marketing research firm, in conducting a comparative taste test, provided three types of
Peanut butter to a sample of households randomly selected within the state.Which of the 4
Methods of data collection is involved when people are asked to compare the three types of
Peanut butter?
A) Published sources
B) Experimentation
C) Surveying
D) Observation

Accepted Answer

The answer of A marketing research firm, in conducting a...

Question 4

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,
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.

Accepted Answer

The answer of A sample of 300 subscribers to a...

Question 5

A study attempted to estimate the proportion of Florida residents who were willing to spend
More tax dollars on protecting the beaches from environmental disasters.Twenty-five hundred
Florida residents were surveyed.What type of data collection procedure was most likely used to
Collect the data for this study?
A) A designed experiment
B) A published source
C) A random sample
D) Observational data

Accepted Answer

A random sample is most likely used in this study to ensure that the surveyed group of Florida residents is representative of the entire population, allowing for generalization of the results.

Question 6

The Quality Assurance Department of a large urban hospital is attempting to monitor and
evaluate patient satisfaction with hospital services.Prior to discharge, a random sample of
patients is asked to fill out a questionnaire to rate such services as medical care, nursing, therapy,
laboratory, food, and cleaning.The Quality Assurance Department prepares weekly reports that
are presented at the Board of Directors meetings and extraordinary/atypical ratings are easy to
flag.True population characteristics estimated from the sample results each week are called
_______.

Accepted Answer

The answer of The Quality Assurance Department of a large...

Question 7

Which of the following is NOT a reason for the need for sampling?
A) It is usually too costly to study the whole population.
B) It is usually too time consuming to look at the whole population.
C) It is sometimes destructive to observe the entire population.
D) It is always more informative by investigating a sample than the entire population.

Accepted Answer

Choice A, B, and C are all valid reasons why sampling may be necessary. However, choice D is incorrect, as there may be situations where investigating the entire population would be more informative than investigating a sample.

Question 8

The Quality Assurance Department of a large urban hospital is attempting to monitor and
evaluate patient satisfaction with hospital services.Prior to discharge, a random sample of
patients is asked to fill out a questionnaire to rate such services as medical care, nursing, therapy,
laboratory, food, and cleaning.The Quality Assurance Department prepares weekly reports that
are presented at the Board of Directors meetings and extraordinary/atypical ratings are easy to
flag.Values computed from the sample results each week are called _______.

Accepted Answer

The answer of The Quality Assurance Department of a large...

Question 9

The British Airways Internet site provides a questionnaire instrument that can be answered
Electronically.Which of the 4 methods of data collection is involved when people complete the
Questionnaire?
A) Published sources
B) Experimentation
C) Surveying
D) Observation

Accepted Answer

The method of data collection involved when people complete a questionnaire electronically is surveying, as it involves collecting data by asking people questions.

Question 10

To demonstrate a sampling method, the instructor in a class picked the first 5 students sitting in
The last row of the class.This is an example of a
A) systematic sample
B) simple random sample
C) stratified sample
D) convenience sample

Accepted Answer

This is a convenience sample because the instructor chose students who were easily accessible, without any randomization or stratification.

Question 11

The Commissioner of Health in New York State wanted to study malpractice litigation in New
York.A sample of 31 thousand medical records was drawn from a population of 2.7 million
patients who were discharged during 2010.The true proportion of malpractice claims filed from
the population of 2.7 million patients is a _______.

Accepted Answer

The answer of The Commissioner of Health in New York...

Question 12

The manager of the customer service division of a major consumer electronics company is
Interested in determining whether the customers who have purchased a Blu-ray player made by
The company over the past 12 months are satisfied with their products.Which of the following
Will be a good frame for drawing a sample?
A) Telephone directory.
B) Voting registry.
C) The list of customers who returned the registration card.
D) A list of potential customers purchased from a database marketing company.

Accepted Answer

The list of customers who returned the registration card is the most relevant frame as it directly relates to customers who have purchased and registered their Blu-ray players, indicating they are actual users of the product.

Question 13

Which of the following sampling methods is a probability sample?
A) Convenience sample
B) Quota sample
C) Stratified sample
D) Judgment sample

Accepted Answer

A stratified sample is a probability sample that involves dividing the population into subgroups and then randomly selecting participants from each subgroup in proportion to their representation in the population. This ensures that every subgroup is represented in the sample, and the results can be generalized to the entire population. The other options (A) Convenience sample, (B) Quota sample, and (D) Judgment sample are all non-probability samples, which means that participants are selected based on some criteria other than random selection, making it difficult to generalize the results to the entire population.

Question 14

At US Data Corporation's web site, they advertised that "Because of our commitment to quality
And our vast amount of industry knowledge and experience, we have grown to be one of
America's leading providers of mailing lists, marketing data, sales leads and research data.We
Maintain databases of information on consumers and businesses nationwide that set industry
Standards for mission critical currency, reliability and accuracy." Trying to reach 500 potential
Donors for their annual phone donation campaign, a local fire department purchased a list of
Donors from the company.This list is an example of a
A) stratified sample
B) systematic sample
C) judgment sample
D) frame

Accepted Answer

The list of donors purchased from the company is a frame, which is a list or database from which a sample is drawn.

Question 15

The Commissioner of Health in New York State wanted to study malpractice litigation in New
York.A sample of 31 thousand medical records was drawn from a population of 2.7 million
patients who were discharged during 2010.The proportion of malpractice claims filed from the
sample of 31 thousand patients is a _______.

Accepted Answer

The answer of The Commissioner of Health in New York...

Question 16

Jared was working on a project to look at global warming and accessed an Internet site where
He captured average global surface temperatures from 1866.Which of the four methods of data
Collection was he using?
A) Published sources
B) Experimentation
C) Surveying
D) Observation

Accepted Answer

Jared was using published sources because he accessed an Internet site to obtain historical data on global surface temperatures.

Question 17

Which of the following is NOT a reason for selecting a sample?
A) A sample is less time consuming than a census.
B) A sample is less costly to administer than a census.
C) A sample is usually not a good representation of the target population.
D) A sample is less cumbersome and more practical to administer.

Accepted Answer

Selecting a sample is done to reduce time, cost, and administration burden compared to conducting a census. The purpose of a sample is to provide a representative sample of the target population, so option C is incorrect.

Question 18

A company selling apparel online sends out emails every Monday to all its customers who
Made a purchase.This is an example of a
A) systematic sample
B) convenience sample
C) simple random sample
D) stratified sample

Accepted Answer

This is a convenience sample because the company is sending emails to customers who have already made a purchase, which is a readily accessible group, rather than selecting a random or stratified sample from the entire customer base.

Question 19

The personnel director at a large company studied the eating habits of the company's
Employees.The director noted whether employees brought their own lunches to work, ate at the
Company cafeteria, or went out to lunch.The goal of the study was to improve the food service at
The company cafeteria.This type of data collection would best be considered as
A) an observational study.
B) a designed experiment.
C) a random sample.
D) a quota sample.

Accepted Answer

The study involves observing and recording the eating habits of employees without manipulating any variables, which characterizes an observational study.

Question 20

To obtain a sample of 10 books in the store, the manager walked to the first shelf next to the
Cash register to pick the first 10 books on that shelf.This is an example of a
A) systematic sample
B) simple random sample
C) stratified sample
D) convenience sample

Accepted Answer

This is a convenience sample because the manager chose books that were easiest to access, without any randomization or systematic method.

Quiz 1: Defining and Collecting Data

A statistics student found a reference in the campus library that contained the median family Incomes for all 50 states.She would report her data as being collected using

Which of the following scenarios will yield a nonprobability sample?

A marketing research firm, in conducting a comparative taste test, provided three types of Peanut butter to a sample of households randomly selected within the state.Which of the 4 Methods of data collection is involved when people are asked to compare the three types of Peanut butter?

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,

Which of the following is NOT a reason for the need for sampling?

The British Airways Internet site provides a questionnaire instrument that can be answered Electronically.Which of the 4 methods of data collection is involved when people complete the Questionnaire?

To demonstrate a sampling method, the instructor in a class picked the first 5 students sitting in The last row of the class.This is an example of a

Which of the following sampling methods is a probability sample?

Jared was working on a project to look at global warming and accessed an Internet site where He captured average global surface temperatures from 1866.Which of the four methods of data Collection was he using?

Which of the following is NOT a reason for selecting a sample?

A company selling apparel online sends out emails every Monday to all its customers who Made a purchase.This is an example of a

To obtain a sample of 10 books in the store, the manager walked to the first shelf next to the Cash register to pick the first 10 books on that shelf.This is an example of a