Exam 1: Defining and Collecting Data

The answer to the question "What is your favorite color?" is an example of an ordinal scaled variable.

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.She divided the fifty students on her roster into ten groups starting from the first student on the roster.The first student was randomly selected from the first group.Then every tenth student was selected from the remaining students.This is an example of a cluster sample.

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

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.

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 will more likely be susceptible to ethical violation when used to form conclusions about the entire population?

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

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

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.

SCENARIO 1-2 A Wall Street Journal poll asked 2,150 adults in the U.S.a series of questions to find out their view on the U.S.economy. -Unemployed but actively looking for job, 3.Unemployed and quit looking for job?" are values from a

A statistic is usually used to provide an estimate for a usually unobserved parameter.

To find out the potential impact of a new zoning law on a neighborhood, the legislators conduct a focus group interview by inviting the members of the housing owner's association of that neighborhood.This is an example of a

SCENARIO 1-1 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. -Referring to Scenario 1-1, the possible responses to the question "How much time do you use theBlu-ray player every week on the average?" result in

The chancellor of a major university was concerned about alcohol abuse on her campus and wanted to find out the proportion of students at her university who visited campus bars on the weekend before the final exam week.Her assistant took a random sample of 250 students.The portion of students in the sample who visited campus bars on the weekend before the final exam week is an example of .

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

A summary measure that is computed to describe a characteristic from only a sample of the population is called

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 .

A sample is the portion of the universe that is selected for analysis.

SCENARIO 1-3 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. -Referring to Scenario 1-3, which of the following questions in the survey will NOT likely induce a measurement error?

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.The population of interest is