Exam 1: Introduction

In purchasing an automobile,there are a number of variables to consider.The body style of the car (sedan,coupe,wagon,etc.)is an example of a ________ variable.

The brand of TV one owns is an example of an ordinal scaled variable.

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

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

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 ________.

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 DVD 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 "What is your age at last birthday?" result in

The Dean of Students conducted a survey on campus.The gender of the student is an example of a ________ variable.

TABLE 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 Table 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 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.

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 DVD 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 "In which year were you born?" are values from a

TABLE 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 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" results in

The amount of time a student spent studying for an exam is an example of a continuous variable.

The oranges grown in corporate farms in an agricultural state were damaged by some unknown fungi a few years ago.Suppose the manager of a large farm wanted to study the impact of the fungi on the orange crops on a daily basis over a 6-week period.On each day a random sample of orange trees was selected from within a random sample of acres.The daily average number of damaged oranges per tree and the proportion of trees having damaged oranges were calculated.In this study,the presentation and characterization of the two main measures calculated each day (i.e.,average number of damaged oranges per tree and proportion of trees having damaged oranges)is called ________.

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 variable of interest to the researcher.

The answer to the question "What is your favorite color?" is an example of an ordinal scaled variable.

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 DVD 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 "What brand of DVD player did you purchase?" are values from a

The answer to the question "What is your sleeping bag temperature rating?" is an example of a ratio scaled variable.

The amount of alcohol consumed by a person per week is an example of a continuous variable.

The Dean of Students conducted a survey on campus.Grade point average (GPA)is an example of a ________ numerical variable.

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 DVD 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 "How many people are there in your household?" result in