Question 1

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 2

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 specifically to obtain a representative section of the target population, so option C is not a reason for selecting a sample. Options A, B, and D are all valid reasons for selecting a sample.

Question 3

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 4

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 as he accessed an Internet site to obtain historical data on average global surface temperatures.

Question 5

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 6

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 data was obtained from a published source, so it is considered to be secondary data and collected through observational methods.

Question 7

Which of the 4 methods of data collection is involved when a person counts the number of cars passing designated locations on the Los Angeles freeway system?
A) Published sources
B) Experimentation
C) Surveying
D) Observation

Accepted Answer

The method of data collection involved in this scenario is observation, as the person is directly observing and counting the number of cars passing by. The other options (published sources, experimentation, and surveying) involve obtaining data through other means.

Question 8

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 because it specifically includes those who have purchased the Blu-ray player and are likely to have used it, thus providing a relevant sample for assessing customer satisfaction.

Question 9

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

A nonprobability sample is one where items or individuals are chosen without regard to their probability of occurrence. Choices A, C, and D are all probability sampling methods.

Question 10

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

Surveying involves collecting data from people by asking them questions. The British Airways Internet site provides a questionnaire instrument that can be answered electronically, which is a form of surveying.

Question 11

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

Investigating the entire population may sometimes be more informative than just studying a sample.

Question 12

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 where the population is divided into strata (subgroups) based on certain characteristics or variables, and a random sample is then taken from each stratum. This ensures that each stratum is fairly represented in the sample, increasing the precision and accuracy of the results. Convenience, quota, and judgment samples are all non-probability samples.

Question 13

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 it as an observational study.

Question 14

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 15

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

A frame is a list or database from which a sample is drawn. In this case, the list of donors purchased by the fire department serves as the frame for their campaign.

Question 16

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 17

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 18

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 as the manager picked books from the shelf closest to them without any specific criteria or random selection process.

Question 19

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 Florida residents represent the larger population, allowing for generalization of the results.

Question 20

Tim was planning for a meeting with his boss to discuss a raise in his annual salary. In preparation, he wanted to use the Consumer Price Index to determine the percentage increase in
His real (inflation-adjusted) salary over the last three years. Which of the 4 methods of data
Collection was involved when he used the Consumer Price Index?
A) Published sources
B) Experimentation
C) Surveying
D) Observation

Accepted Answer

The Consumer Price Index is a published source of data, typically provided by government agencies or other organizations that track economic indicators.

Quiz 1: Defining and Collecting Data

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

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 4 methods of data collection is involved when a person counts the number of cars passing designated locations on the Los Angeles freeway system?

Which of the following scenarios will yield a nonprobability sample?

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?

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

Which of the following sampling methods is a probability 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,

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