Exam 1: Defining and Collecting Data

To estimate the mean number of hours a student at a major university spent in the library, a researcher obtained the list of students from the registrar's office, from which she can select a random sample of 200 students.This list is 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 the Blu-ray player every week on the average?" are values from a

Most analysts focus on the cost of tuition as the way to measure the cost of a college education.But incidentals, such as textbook costs, are rarely considered.A researcher at Drummand University wishes to estimate the textbook costs of first-year students at Drummand.To do so, she monitored the textbook cost of 250 first-year students and found that their average textbook cost was $600 per semester.Identify the sample in the study.

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

The only reliable way a researcher can make statistical inferences from a sample to a population is to use nonprobability sampling methods.

The oranges grown in corporate farms in an agricultural state were damaged by some unknown fungi a few years ago.Suppose the manager of a large farm wanted to study the impact of the fungi on the orange crops daily over a 6-week period.On each day a random sample of orange trees was selected from within a random sample of acres.The daily average number of damaged oranges per tree and the proportion of trees having damaged oranges were calculated.The two main measures calculated each day (i.e., average number of damaged oranges per tree and proportion of trees having damaged oranges)are called _______.

The question "How many times have you abused illicit drugs in the last 6 months?" will most likely result in nonresponse error.

The answer to the question "What is your sleeping bag temperature rating?" is an example of a ratio scaled variable.

The grade level (K-12)of a student is an example of a numerical variable.

A convenience sample is a type of probability 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 "In which year do you think the last recession in the U.S.started?" result in

The Dean of Students conducted a survey on campus.Major area of study is an example of a _______ variable.

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, the manager decides to ask a sample of customers, who have bought a Blu-ray player made by the company and filed a complaint over the past year, to fill in a survey about whether they are satisfied with the product.This method will most likely suffer from

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 unemployment rate?" result in

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 can be reduced by proper interviewer training?

A population is the totality of items or things under consideration.

Using different frames to generate data can lead to totally different conclusions.

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

Which of the following is most likely a population as opposed to a sample?