SOLUTION: The survey has bias. (a) Determine the type of bias. (b) Suggest a remedy. A textbook publisher wants to determine what percentage of college professors either require or rec

Algebra ->  Probability-and-statistics -> SOLUTION: The survey has bias. (a) Determine the type of bias. (b) Suggest a remedy. A textbook publisher wants to determine what percentage of college professors either require or rec      Log On


   



Question 877886: The survey has bias.
(a) Determine the type of bias.
(b) Suggest a remedy.
A textbook publisher wants to determine what percentage of college professors either require or recommend that their students purchase textbook packages with supplemental materials, such as study guides, digital media, and online tools. The publisher sends out surveys by e-mail to a random sample of 320 faculty members who have registered with its Web site and have agreed to receive solicitations. The publisher reports that 80% of college professors require or recommend that their students purchase some type of textbook package
To determine the public’s opinion of the police department, the police chief obtains a cluster sample of 15 census tracts within his jurisdiction and samples all households in the randomly selected tracts. Uniformed police officers go door to door to conduct the survey.

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