Exam 1: Introduction

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 wanted 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.

Compiling the number of registered voters who turned out to vote for the primary in Iowa is an example of descriptive statistics.

Most colleges admit students based on their achievements in a number of different areas. The grade obtained in senior level English (A, B, C, D, or F)is an example of a ________ 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 is your annual income rounded to the nearest thousand?" are values from a

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. All the employees in the corporation constitute the ________.

A study is under way in Yosemite National Forest to determine the height of adult 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.

The amount of coffee consumed by an individual in a day is an example of a discrete numerical variable.

The Dean of Students conducted a survey on campus. Class designation (Freshman, Sophomore, Junior, Senior)is an example of a ________ variable.

A population is the totality of items or things under consideration.

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

Faculty rank (professor to lecturer)is an example of discrete numerical data.

TABLE 1-2 A Wall Street Journal poll asked 2,150 adults in the United States 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 "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?" are values from a

An insurance company evaluates many numerical variables about a person before deciding on an appropriate rate for automobile insurance. A person's age is an example of a ________ numerical variable.

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

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. The answer on "whether you visited campus bars on the weekend before the final exam week" from students in the sample is an example of

Those methods involving the collection, presentation, and characterization of a set of data in order to properly describe the various features of that set of data are called

The process of using data collected from a small group to reach conclusions about a large group is called

The oranges grown on 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 six-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. The two main measures calculated each day (i.e., average number of damaged oranges per tree and proportion of trees having damaged oranges)are called ________.

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

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