Exam 1: Introduction

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.

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 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.

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

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 ________.

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.

The average number of units earned per semester by college students is suspected to be rising.A researcher at Calendula College wishes to estimate the number of units earned by students during the spring semester at Calendula.To do so,he randomly selects 100 student transcripts and records the number of units each student earned in the spring term.Identify the variable of interest to the researcher.

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

The Commissioner of Health in New York State wanted to study malpractice litigation in New York.A sample of 31 thousand medical records was drawn from a population of 2.7 million patients who were discharged during 2010.Using the information obtained from the sample to predict population characteristics with respect to malpractice litigation is an example of ________.

An insurance company evaluates many numerical variables about a person before deciding on an appropriate rate for automobile insurance.The number of tickets a person has received in the last 3 years 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.

Using the number of registered voters who turned out to vote for the primary in Iowa to predict the number of registered voters who will turn out to vote in Vermont's primary is an example of descriptive statistics.

The quality ("terrible," "poor," "fair," "acceptable," "very good" and "excellent")of a day care center is an example of a nominal scaled variable.

Most colleges admit students based on their achievements in a number of different areas.The total SAT score achieved by a student 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 "Are you happy,indifferent,or unhappy with the performance per dollar spent on the DVD player?" result in

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.

The answer to the question "How do you rate the quality of your business statistics course?" is an example of an ordinal scaled 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 collection and summarization of the socioeconomic and physical characteristics of the employees of a particular firm 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