Exam 1: Defining and Collecting Data

A personal computer user survey was conducted.The number of years using a personal computer is an example of a numerical variable.

Which of the following yields a stratified sample?

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 population of interest to the researcher.

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 Blu-ray players made by other manufacturers have you used?" are values from a

The answer to the question "How many hours on average do you spend watchingTV every week?" is an example of a ratio scaled variable.

Student grades (A to F) are an example of continuous numerical data.

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, if there are 4 different brands of Blu-ray players made by the company, the best sampling strategy would be to use a

For a population frame containing N = 1,007 individuals, what code number should you assign to the first person on the list to use a table of random numbers?

The portion of the universe that has been selected for analysis is called

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

Researchers suspect that the average number of units earned per semester by college students is rising.A researcher at Calendula College wishes to estimate the number of units earned by students during the spring semester at Calendula.To do so, he randomly selects 100 student transcripts and records the number of units each student earned in the spring term.He found that the average number of semester units completed was 12.96 units per student.Identify the population of interest to the researcher.

Most colleges admit students based on their achievements in several different areas.The totalSAT score achieved by a student is an example of a numerical 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 "What is your annual income rounded to the nearest thousands?" result in

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 "What do you think is the current unemployment rate?" result in

Which of the following can be reduced by proper interviewer training?

The Dean of Students conducted a survey on campus.SAT score in mathematics is an example of a numerical variable.

A personal computer user survey was conducted.Number of personal computers owned is an example of a numerical variable.

Which of the following yields a simple random sample?

An insurance company evaluates many numerical variables about a person before deciding on an appropriate rate for automobile insurance.The number of tickets a person has received in the last3 years is an example of a numerical variable.