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.

TABLE 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 Table 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

True or False: A convenience sample is a type of probability sample.

________ results from the exclusion of certain groups of subjects from a population frame.

Which of the following is a continuous quantitative (numerical)variable?

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.

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

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

TABLE 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. -True or False: The answer to the question "What is your sleeping bag temperature rating?" is an example of a ratio scaled variable.

Which of the following yields a stratified sample?

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

Tim was planning for a meeting with his boss to discuss a raise in his annual salary.In preparation,he wanted to use the Consumer Price Index to determine the percentage increase in his real (inflation-adjusted)salary over the last three years.Which of the 4 methods of data collection was involved when he used the Consumer Price Index?

True or False: Selection bias occurs more frequently in systematic samples than in simple random samples.

In purchasing an automobile,there are a number of variables to consider.The color of the car is an example of a ________ variable.

The classification of student class designation (freshman,sophomore,junior,senior)is an example of

In purchasing an automobile,there are a number of variables to consider.The classification of the car as a subcompact,compact,standard,or luxury size is an example of a ________ variable.

True or False: The amount of calories contained in a 12-ounce package of cheese will be measured on a ratio scale.

True or False: A sample is the portion of the universe that is selected for analysis.

TABLE 1-2 A Wall Street Journal poll asked 2,150 adults in the United States a series of questions to find out their view on the U.S.economy. -Referring to Table 1-2,the possible responses to the question "On the scale of 1 to 100 with 1 being extremely anxious and 100 being totally not anxious,rate your level of anxiety in this U.S.economy" are values from a

TABLE 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 Table 1-1,the possible responses to the question "Are you happy,indifferent,or unhappy with the performance per dollar spent on the Blu-ray player?" are values from a