Exam 1: Introduction

A personal computer user survey was conducted. The hours of personal computer use per week is an example of a ________ numerical variable

Which of the following is most likely a parameter as opposed to a statistic?

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

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 DVD players made by other manufacturers have you used?" are values from a

Researchers are concerned that the weight of the average American school child is increasing, implying, among other things, that children's clothing should be manufactured and marketed in larger sizes. If X is the weight of school children sampled in a nationwide study, then X is an example of

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 many people in your household are unemployed currently?" are values from a

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

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

The classification of student class designation (freshman, sophomore, junior, senior)is an example of

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

In purchasing an automobile, there are a number of variables to consider. The color of the car is an example of a ________ 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. The collection, presentation, and characterization of the data from patient medical records are examples of ________.

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

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 variable of interest in the study.

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 many more months do you think the U.S. economy will require to get out of a recession?" are values from a

A continuous variable may take on any value within its relevant range even though the measurement device may not be precise enough to record it.

Marital status is an example of a numerical variable.

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

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 sample in the study.