Exam 11: Sample Surveys

A magazine publisher mails a survey to every subscriber asking about the timeliness of its subscription service.The publisher finds that only 4% of the subscribers responded.This 4% represents what?

A large 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?

A magazine publisher mailed a survey to all of its subscribers asking if the magazine is helpful in their daily lives.Every subscriber responded and 65% replied that the magazine was helpful.The value 65% is known as what?

A newspaper reporter randomly sampled households by telephone during various times of the day.The people sampled are within the area of the newspaper's distribution.The newspaper reporter asked,"Are you patriotic in a time of war or armed conflict?" What,if any,will be the most noticeable bias for this survey?

A computer network manager wants to test the reliability of some new and expensive fiber-optic Ethernet cables that the computer department just received.The computer department received 8 boxes containing 40 cables each.The manager does not have the time to test every cable in each box.The manager will choose one box at random and test 8 cables chosen randomly within that box.What is the population?

Inside the boxes of a new brand of cereal,is a short survey that can be mailed back for free to the manufacturer.The survey asks the consumer if he or she likes the cereal or not.What,if any,will be the most noticeable bias for this survey?

A magazine publisher is informed that 54% of subscribers last year did not renew their subscriptions.This publisher wants to randomly survey 11% of these past subscribers asking the reason why they did not renew their subscriptions.A list of last year's subscribers who did not renew their subscriptions is known as what?

A computer network manager wants to test the reliability of some new and very expensive fiber-optic Ethernet cables that the computer department just received.The computer department received 7 boxes containing 50 cables each.The manager does not have the time to test every cable in each box,so the manager assigns a subordinate to do a census.How many cables will be sampled if the subordinate does a census?

Management at a post office is curious about its services in one small town.Every address within that town,including business and residential,is mailed a survey inquiring about the post office's quality of service.The post office does receive a respectable 25% response rate to the survey.However,what,if any,is the most noticeable bias for this survey?

A cereal manufacturer randomly samples households across the country by telephone.The survey asks the consumer to explain honestly in fifty words or less why he or she likes or dislikes its brand of cereals.It is also stated that for those who participate in this telephone survey,a random drawing will be held for an all-expense paid,two-week cruise.What,if any,will be the most noticeable bias for this survey?