Exam 1: Defining and Collecting Data

Which of the following sampling methods is a probability sample?

A study attempted to estimate the proportion of Florida residents who were willing to spend more tax dollars on protecting the beaches from environmental disasters.Twenty-five hundred Florida residents were surveyed.What type of data collection procedure was most likely used to collect the data for this study?

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

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

The amount of time a student spent studying for an exam will be measured on a ratio scale.

SCENARIO 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 Blu-ray player made by the company over the past 12 months are satisfied with their products. -Referring to Scenario 1-1, the possible responses to the question "What is your annual income rounded to the nearest thousands?" result in

There can be only one sample selected from a population.

SCENARIO 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. -Unemployed but actively looking for job, 3.Unemployed and quit looking for job?" result in

The only way one can eliminate sampling error is to take the whole population as the sample.

In business statistics class students sit randomly without preferences.A sample is selected by including everybody who sits in the first row.This is an example of a cluster sample.

A personal computer user survey was conducted.Computer brand primarily used is an example of a 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 without rounding, then X is an example of

A population frame for a survey contains a listing of 6,179 names.Using a table of random numbers, which of the following code numbers will appear on your list?

SCENARIO 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 Blu-ray player made by the company over the past 12 months are satisfied with their products. -Referring to Scenario 1-1, the possible responses to the question "What is your annual income rounded to the nearest thousands?" are values from a

Systematic samples are less efficient than a stratified sample.

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 daily 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.The two main measures calculated each day (i.e., average number of damaged oranges per tree and proportion of trees having damaged oranges) may be used daily to estimate the respective true population _.

The question "Is your household income last year somewhere between $50,000 and $100,000?" will most likely result in coverage error.

A company selling apparel online sends out emails every Monday to all its customers who made a purchase.This is an example of a

The Dean of Students conducted a survey on campus.The gender of the student is an example of a variable.

A personal computer user survey was conducted.The number of years using a personal computer is an example of a numerical variable.