Pollsters take a survey of people at a ball game to collect and analyze data about favorite leisure activities of Star City’s residents. Would this study be biased? Why or why not?
The population of a town is divided into three age categories. A random sample of each category is surveyed about voting choices. This type of sampling is called
Brand Y Cola sponsors a survey of 15,559 residents of Texas to determine which brand of cola they prefer. Forty percent say they prefer Brand X, and 60 percent say they prefer Brand Y. Which of the following is the sample used for the survey ?
A professor surveys his students about their opinions on how well he taught the course. He puts this survey on the last page of his final exam. Which type of bias will most likely have the strongest effect on the survey results?
Researchers periodically survey a few thousand of the patients taking a certain medication in order to make connections between that medication and the subjects’ general health. This method of gathering data is classified as
Political pollsters now make sure to conduct a percentage of their telephone interviews by calling mobile phones. This policy best addresses which potential source of bias?
Which of the following could be classified as a census?
A market research company wants to collect opinions on the comfort and performance of a new type of sneaker by Brand X. Which group of individuals would be the best choice for a random sample?
At the beginning of a call to the cable company, a message tells customers, “After you finish talking to our customer service representative, you will be asked to take a five-question survey about the level of service you received. It would be appreciated if you could please stay on the line to answer the survey questions.” What type of sampling is the cable company using?
A company wants to learn about the number of its employees who visit the dentist for regular checkups. Which type of study will best help the company discover this information?
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