Exam 1: Defining and Collecting Data

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

An insurance company evaluates many numerical variables about a person before deciding on an appropriate rate for automobile insurance.The number of claims a person has made in the last 3 years is an example of a numerical variable.

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.

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?

When recoding variables, a successful recoding of each variable requires the properties of being and .

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

The universe or "totality of items or things" under consideration is called

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 satisfied are you with the U.S.economy today with 1 = very satisfied, 2 = moderately satisfied, 3 = neutral, 4 = moderately dissatisfied and 5 = very dissatisfied?" result in

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 in order to study their preferences for the various components of a potential package.The Director will use the data from the sample to compute .

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 "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 Dean of Students mailed a survey to a total of 400 students.The sample included 100 students randomly selected from each of the freshman, sophomore, junior, and senior classes on campus last term.What sampling method was used?

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

To gather information on the preferences of instructors at universities on topics for a business statistics textbook that it will publish, a publishing company invited 10 faculty members who have adopted one of the textbooks that it has published.This is an example of a

When dealing with human surveys, we are usually interested in sampling with replacement.

Most colleges admit students based on their achievements in several different areas.The grade obtained in senior level English.(A, B, C, D, or F) is an example of a variable.

A population frame for a survey contains a listing of 72,345 names.Using a table of random numbers, how many digits will the code numbers for each member of your population contain?

Sampling error can be eliminated by taking larger sample sizes.

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.

The classification of student major (accounting, economics, management, marketing, other) is an example of