Exam 1: Defining and Collecting Data

TABLE 1-3 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 Table 1-3,if there are 4 different brands of Blu-ray players made by the company,the best sampling strategy would be to use

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

True or False: As a population becomes large,it is usually better to obtain statistical information from the entire population.

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?

A statistics student found a reference in the campus library that contained the median family incomes for all 50 states.She would report her data as being collected using

True or False: The professor of a business statistics class wanted to find out the mean amount of time per week her students spent studying for the class.Among the 50 students in her class,20% were freshmen,50% were sophomores and 30% were juniors.She decided to select 2 students randomly from the freshmen,5 randomly from the sophomores and 3 randomly from the juniors.This is an example of a systematic sample.

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 Blu-ray 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 Blu-ray player did you purchase?" are values from a

A personal computer user survey was conducted.Number of personal computers owned is an example of a ________ numerical variable.

True or False: The question "How many times have you abused illicit drugs in the last 6 months?" will most likely result in nonresponse error.

True or False: Whether the university is private or public is an example of a nominal scaled 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 Blu-ray 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 is your annual income rounded to the nearest thousands?" result in

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

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

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 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 Blu-ray player made by the company over the past 12 months are satisfied with their products. -True or False: 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.

True or False: The amount of alcohol consumed by a person per week is an example of a continuous variable.

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 "On the scale of 1 to 100 with 1 being extremely anxious and 100 being totally not anxious,rate your level of anxiety in this U.S.economy" results in

True or False: Systematic samples are less efficient than a stratified sample.

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 Blu-ray player made by the company over the past 12 months are satisfied with their products. -True or False: Faculty rank (professor to lecturer)is an example of discrete numerical data.

True or False: To gather opinions on the efficacy of U.S.foreign policies,a sample of 50 faculty members is selected from the pool of university professors who have taught political science at the graduate level.This is an example of a judgment sample.