Exam 1: Introduction

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. In this study, methods that result in decisions concerning population characteristics based only on the sample results are called ________.

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, drawing conclusions on any one day about the true population characteristics based on information obtained from the sample is called ________.

The amount of alcohol consumed by a person per week will be measured on an interval scale.

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.

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

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

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

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 "How do you rate the quality of your business statistics course?" is an example of an ordinal scaled variable.

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

The Dean of Students conducted a survey on campus. Number of credits currently enrolled for is an example of a ________ numerical variable.

The possible responses to the question "How many times in the past three months have you visited a city park?" are values from a discrete variable.

Whether the university is private or public is an example of a nominal scaled 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.

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.

A personal computer user survey was conducted. Computer brand primarily used 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 "In which year were you born?" are values from a

The estimation of the population average family expenditure on food based on the sample average expenditure of 1,000 families is an example of

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.

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 500 employees who will participate in this study constitute the ________.