The January 2005 Gallup Youth Survey telephoned a random sample of 1,028 U.S. teens aged 13-17 and asked these teens to name their favorite movie from 2004. Napoleon Dynamite had the highest percentage with 8% of teens ranking it as their favorite movie. Which is true? I. The population of interest is U.S. teens aged 13-17. II. 8% is a statistic and not the actual percentage of all U.S. teens who would rank this movie as their favorite. III. This sampling design should provide a reasonably accurate estimate of the actual percentage of all U.S. teens who would rank this movie as their favorite.

Suppose your local school district decides to randomly test high school students for attention deficit disorder (ADD). There are three high schools in the district, each with grades 9-12. The school board pools all of the students together and randomly samples 250 students. Is this a simple random sample?

A chemistry professor who teaches a large lecture class surveys his students who attend his class about how he can make the class more interesting, hoping he can get more students to attend. This survey method suffers from

A magazine publisher mails a survey to every subscriber asking about the quality of its subscription service. Mailing a survey to every subscriber represents what?

A magazine publisher mails a survey to every subscriber asking about the quality of its magazine. The publisher wants 100% of the subscribers to respond. This 100% response rate will represent what?

A magazine publisher is informed that 72% of subscribers last year did not renew their subscriptions. This publisher wants to randomly survey 8% of these past subscribers asking the reason why they did not renew their subscriptions. All of last year's subscribers who did not renew their subscriptions are known collectively as what?

A magazine publisher always mails out a questionnaire two months before a subscription ends. This questionnaire asks its subscribers if they are going to renew their subscriptions. On average, only 9% of the subscribers respond to the questionnaire. Of the 9% who do respond, an average of 45% say that they will renew their subscription. This 9% who respond to the questionnaire are known as what?

Mr. Smith works at a computer consultant company that provides technical information to computer departments of various manufacturing companies. Mr. Smith is alarmed at the number of spyware programs on the internet. Mr. Smith successfully samples every one of his clients only to ask (yes or no) if they have had any known problems with spyware infections on their computers or network. None of Mr. Smith's clients reported any spyware infections. With regards to Mr. Smith's contacting his clients, what is the census?

An education researcher randomly selects 38 schools from one school district and interviews all the teachers at each of the 38 schools. Identify the type of sampling used in this example.

At the local college a survey was being done on whether or not the students liked the cafeteria food. The survey was located in the college newspaper and was to be filled out and sent to the editing office. Identify the type of sampling used in this example.

A non-for-profit consumer agency wanted to investigate the economic and humanitarian contribution of this country's pharmaceutical companies by sampling large companies and businesses of all types. It was decided to sample the pharmaceutical companies first. After surveying the pharmaceutical companies, someone at the consumer agency wanted to distribute the data early. What, if any, will be the most noticeable bias in distributing the survey at this point in time?

A popular soft drink company distributes written surveys with its product that a customer can fil out and mailed in or the survey can be filled out electronically on the internet. What, if any, will be the most noticeable bias?

Management at a particular post office wants to know about the quality of its face-to-face service at its customer service windows. For one week, the post office will ask the customers directly. After a customer is helped, a different employee asks the customer a short question about his or her customer service experience. The customer's comments are then transcribed by a secretary. This survey runs smoothly and a lot of customer comments are collected. What, if any, is the most noticeable bias for this survey regarding customer service at this post office for that week?

This state's largest university is comprised of several different colleges, institutes, and schools of study. These colleges, institutes, and schools are spread out throughout the city and nearby suburbs. The president of the university is curious about the average cost for a full-time, undergraduate student to attend one semester. All relevant costs to the student will be counted, including tuition, room and board, transportation, books, and so on. Tuition varies greatly within this university, and there are significant population differences among the colleges, institutes, and schools. What would be the most appropriate sampling method to use in order to estimate an average cost of attending this university for one semester?