Exam 1: Introduction

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

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 true proportion of malpractice claims filed from the population of 2.7 million patients is a ________.

The possible responses to the question "How long have you been living at your current residence?" are values from a continuous variable.

The Dean of Students conducted a survey on campus. SAT score in mathematics is an example of a ________ numerical variable.

The level of satisfaction ("Very unsatisfied," "Fairly unsatisfied," "Fairly satisfied," and "Very satisfied")in a class is an example of an ordinal scaled 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 "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

In purchasing an automobile, there are a number of variables to consider. The color of the car is an example of a ________ variable.

The answer to the question "How many hours on average do you spend watching TV every week?" is an example of a ratio scaled 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 variable of interest to the researcher.

A personal computer user survey was conducted. The number of years using a personal computer is an example of a ________ numerical 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 2,150 adults make up

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

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.

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 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 "What do you think is the current unemployment rate?" result in

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 ________.

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 "How many DVD players made by other manufacturers have you used?" result in

Which of the following is a discrete quantitative (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 portion of students in the sample who visited campus bars on the weekend before the final exam week is an example of ________.