Exam 1: Defining and Collecting Data

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.

If a simple random sample is chosen with replacement, everyone has the same chance of selection on every selection.

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?" result in

Marital status is an example of a numerical variable.

As a population becomes large, it is usually better to obtain statistical information from the entire population.

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 would you rate the condition of the U.S.economy with 1 = excellent, 2 = good, 3 = decent, 4 = poor, 5 = terrible?" are values from a

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

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

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.

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

A marketing research firm, in conducting a comparative taste test, provided three types of peanut butter to a sample of households randomly selected within the state.Which of the 4 methods of data collection is involved when people are asked to compare the three types of peanut butter?

A statistic is usually used to provide an estimate for a usually unobserved parameter.

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

The professor of a business statistics class wanted to find out the mean amount of time per week her students spent studying for the class.She divided the fifty students on her roster into ten groups starting from the first student on the roster.The first student was randomly selected from the first group.Then every tenth student was selected from the remaining students.This is an example of a cluster sample.

The question: "Have you used any form of illicit drugs over the past 2 months?" will most likely result in measurement error if the question is answered.

An insurance company evaluates many numerical variables about a person before deciding on an appropriate rate for automobile insurance.How long a person has been a licensed driver is an example of a _______ numerical variable.

Marital status is an example of an ordinal scaled variable.

The answer to the question "How do you rate the quality of your business statistics course" is an example of an ordinal scaled variable.

Which of the following is NOT a reason for selecting a sample?

The amount of time a student spent studying for an exam will be measured on a ratio scale.