14) A textbook publisher wants to determine what percentage of college professors either require or recommend that their students purchase textbook
14) 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.(16) 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.(18) Delivery Format The General Social Survey asks, “About how often did you have sex in the past 12 months?” About 47% of respondents indicated they had sex at least once a week. In a Web survey for a marriage and family wellness center, respondents were asked, “How often do you and your partner have sex (on average)?” About 31% of respondents indicated they had sex with their partner at least once a week. Explain how the delivery method for such a question could result in biased responses.(20) Order of the Questions Consider the following two questions:(a)Do you believe that the government should or should not be allowed to prohibit individuals from expressing their religious beliefs at their place of employment?(b)Do you believe that the government should or should not be allowed to prohibit teachers from expressing their religious beliefs in public schools classrooms?1.6 Applying the concepts(12) Assessment To help assess student learning in her developmental math courses, a mathematics professor at a community college implemented pre- and posttests for her students. A knowledge-gained score was obtained by taking the difference of the two test scores.(a) What type of experimental design is this?(b) What is the response variable in this experiment?(c) What is the treatment?
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