The article “You Will Be Tested on This” (The Chronicle of Higher Education, June 8, 2007) describes an experiment to investigate the effect of quizzes on student learning. The goal of the experiment was to determine if students who take daily quizzes have better end of- semester retention than students who attend the same lectures and complete the same homework assignments but who do not take the daily quizzes. Describe how you would design such an experiment using the 400 students enrolled in an introductory psychology course as subjects.
Answer to relevant QuestionsMany people take ginkgo supplements advertised to improve memory. Are these over-the-counter supplements effective? In a study reported in the paper “Ginkgo for Memory Enhancement” (Journal of the American Medical ...The discharge of industrial wastewater into rivers affects water quality. To assess the effect of a particular power plant on water quality, 24 water specimens were taken 16 km upstream and 4 km downstream of the plant. ...The press release “Luxury or Necessity? The Public Makes a U-Turn” (Pew Research Center, April 23, 2009) summarizes results from a survey of a nationally representative sample of n = 1003 adult Americans. a. One question ...Suppose that a single y observation is made at each of the x values 5, 10, 15, 20, and 25. a. If s = 4, what is the standard deviation of the statistic b? b. Now suppose that a second observation is made at every x value ...Researchers studying pleasant touch sensations measured the firing frequency (impulses per second) of nerves that were stimulated by a light brushing stroke on the forearm and also recorded the subject’s numerical rating ...
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