Exam 1: Defining and Collecting Data

A sample is the portion of the universe that is selected for analysis.

Which of the following yields a simple random sample?

Marital status is an example of a numerical variable.

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

Which of the 4 methods of data collection is involved when a person counts the number of cars passing designated locations on the Los Angeles freeway system?

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

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

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

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

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

The level of satisfaction ("Very unsatisfied", "Fairly unsatisfied", "Fairly satisfied", and "Very satisfied") in a class is an example of a categorical variable.

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

The only way one can eliminate sampling error is to take the whole population as the sample.

A study is under way in Yosemite National Forest to determine the adult height of American pine trees. Specifically, the study is attempting to determine what factors aid a tree in reaching Heights greater than 60 feet tall. It is estimated that the forest contains 25,000 adult American Pines. The study involves collecting heights from 250 randomly selected adult American pine Trees and analyzing the results. Identify the population from which the study was sampled.

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

A personal computer user survey was conducted. The number of computer magazine subscriptions 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 "Out of a 100 point score with 100 being the highest and 0 being the lowest, what is your satisfaction level with the Blu-ray Player that you purchased?" result in

An insurance company evaluates many numerical variables about a person before deciding on an appropriate rate for automobile insurance. The distance a person drives in a year is an example of a _______ variable.

The Quality Assurance Department of a large urban hospital is attempting to monitor and evaluate patient satisfaction with hospital services. Prior to discharge, a random sample of patients is asked to fill out a questionnaire to rate such services as medical care, nursing, therapy, laboratory, food, and cleaning. The Quality Assurance Department prepares weekly reports that are presented at the Board of Directors meetings and extraordinary/atypical ratings are easy to flag. True population characteristics estimated from the sample results each week are called _______.

Items or individuals in a judgment sample are chosen according to their probability of occurrence.