Exam 1: Defining and Collecting Data

Most colleges admit students based on their achievements in several different areas.The grade obtained in senior level English.(A, B, C, D, or F) is an example of a variable.

When participants can self-select into the sample, you have a nonprobability sample.

An electronic appliance chain gathered customer opinions on their services using the customer feedback forms that are attached to the product registration forms.This is an example of a convenience sample.

An insurance company evaluates many numerical variables about a person before deciding on an appropriate rate for automobile insurance.The number of claims a person has made in the last 3 years is an example of a numerical variable.

The sampling process begins by locating appropriate data sources called .

To gather opinions on the efficacy of U.S.foreign policies, a sample of 50 faculty members is selected from the pool of university professors who have taught political science at the graduate level.This is an example of a judgment sample.

The possible responses to the question "How many times in the past three months have you visited a city park?" are values from a discrete variable.

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

The possible responses to the question "How long have you been living at your current residence?" are values from a continuous variable.

When recoding variables, a successful recoding of each variable requires the properties of being and .

The number of defective apples in a single box will be measured on an interval scale.

The amount of alcohol consumed by a person per week will be measured on an interval scale.

Coverage error can become an ethical issue if a group is intentionally excluded from the frame.

The question "Is your household income last year somewhere between $50,000 and $100,000?" will most likely result in coverage error.

The brand of TV one owns is an example of an ordinal scaled variable.

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

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. -Referring to Scenario 1-2, the possible responses to the question "In which year do you think the last recession in the U.S.started?" are values from a

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

Which of the following yields a systematic 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. -Referring to Scenario 1-2, the possible responses to the question "How many people in your household are unemployed currently?" result in