Exam 1: Defining and Collecting Data

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 "What do you think is the current number of people unemployed in the country?" are values from a

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.

Whether the university is private,or public is an example of a categorical variable.

Which of the following yields a simple random sample?

A personal computer user survey was conducted.Hours of personal computer use per week is an example of a numerical variable

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?" are values from a

As a population becomes large,it is usually better to obtain statistical information from the entire population.

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 would you rate the quality of your purchase experience with 1 = excellent,2 = good,3 = decent,4 = poor,5 = terrible?" are values from a

The number of calories contained in a 12-ounce package of cheese will be measured on a ratio scale.

A continuous variable may take on any value within its relevant range even though the measurement device may not be precise enough to record it.

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

Whether the university is private,or public is an example of a nominal scaled variable.

The Human Resources Director of a large corporation wishes to develop an employee benefits package and decides to select 500 employees from a list of all (N = 40,000)workers to study their preferences for the various components of a potential package.The 500 employees who will participate in this study constitute the .

The number of calories contained in a 12-ounce package of cheese is an example of a discrete variable.

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

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

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 many people are there in your household?" are values from a

Since a is not a randomly selected probability sample,there is no way to know how well it represents the overall population.

Sampling error becomes an ethical issue if the findings are purposely presented without reference to sample size and margin of error so that the sponsor can promote a viewpoint that might otherwise be truly insignificant.

The Dean of Students conducted a survey on campus.The gender of the student is an example of a variable.