Exam 1: Defining and Collecting Data

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 2,150 adults make up

The Dean of Students conducted a survey on campus.Number of clubs, groups, teams, and organizations affiliated with on campus 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 many Blu-ray players made by other manufacturers have you used?" are values from a

The answer to the question "What is your sleeping bag temperature rating?" is an example of a ratio scaled 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, if there are 4 different brands of Blu-ray players made by the company, the best sampling strategy would be to use a

The personnel director at a large company studied the eating habits of the company's employees.The director noted whether employees brought their own lunches to work, ate at the company cafeteria, or went out to lunch.The goal of the study was to improve the food service at the company cafeteria.This type of data collection would best be considered as

Which of the following sampling methods will more likely be susceptible to ethical violation when used to form conclusions about the entire population?

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 sample in the study.

Which of the following yields a simple random 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 sample in the study.

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 "On the scale of 1 to 100 with 1 being extremely anxious and 100 being total not anxious, rate your level of anxiety in this U.S.economy" are values from a

A statistic is usually unobservable while a parameter is usually observable.

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 chancellor of a major university was concerned about alcohol abuse on her campus and wanted to find out the proportion of students at her university who visited campus bars on the weekend before the final exam week.Her assistant took a random sample of 250 students and computed the portion of students in the sample who visited campus bars on the weekend before the final exam.The portion of all students at her university who visited campus bars on the weekend before the final exam week is an example of

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.

Selection bias occurs more frequently in systematic samples than in simple random samples.

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.

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.

Whether the university is private, or public is an example of a categorical variable.

Which of the following yields a simple random sample?