Exam 1: Introduction and Data Collection

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 and computed the portion of students in the sample who visited campus bars on the weekend before the final exam. The portion of all students at her university who visited campus bars on the weekend before the final exam week is an example of

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

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

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

A personal computer user survey was conducted. The number of computer magazine subscriptions is an example of a(n) ________ numerical variable.

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

The Dean of Students conducted a survey on campus. Average SAT score in mathematics is an example of a(n)______ 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.

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 total number of students in the sample who visited campus bars on the weekend before the final exam week is an example of

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 videocassette recorder 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?" result in

The Dean of Students conducted a survey on campus. The gender of the student is an example of a(n)________ 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 videocassette recorder made by the company over the past 12 months are satisfied with their products. -Referring to Table 1-1, the population of interest is

Researchers suspect that the average number of units earned per semester by college students is 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. He found that the average number of semester units completed was 12.96 units per student. Identify the population of interest to the researcher.

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.

A personal computer user survey was conducted. Computer brand primarily used is an example of a(n)________ variable.

Mediterranean fruit flies were discovered in California a few years ago and badly damaged the oranges grown in that state. Suppose the manager of a large farm wanted to study the impact of the fruit flies on the orange crops on a daily basis over a 6-week period. On each day a random sample of orange trees were 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 population as opposed to a sample?

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 Dean of Students conducted a survey on campus. Grade point average (GPA) is an example of a(n)____ numerical variable.