1. According to the popular TV show Mythbusters, the answer is "Yes." In the March 9, 2005, episode, the Mythbusters team presented the results of an experiment involving 50 subjects. All the subjects were placed in a booth for an extended period of time and monitored by hidden camera. Two-thirds of the subjects were given a "yawn seed" by one of the experimenters; that is, the experimenter yawned in the subject's presence prior to leaving the room. The remaining subjects were given no yawn seed. What were the results of the 16 subjects who had no yawn seed, 4 yawned. Of the 34 subjects given a yawn seed, 10 yawned. Adam Savage and Jamie Hyneman, the cohosts of Mythbusters, used these results to conclude that yawning is Yawning study Dot Patio contagious. a) Explain how you could use slips of paper to randomly reassign the subjects to the treatment groups, assuming that the treatment received doesn't affect the response, b) Suppose we used your method in (a) to redo the random assignment 50 times. The Fathom dotplot displays the number of subjects in the yawn seed group who yawned in each of these random assignments. What 6 7 8 9 10 11 12 13 conclusion would you draw about whether yawning is contagious? yawe Explain bobo 2. Nurse-practitioners are nursed with advanced qualifications who often act much like primary care physicians Are they as effective as doctors at treating patients with chronic conditions? An experiment was conducted with 1316 patients who had been diagnosed with asthma, diabetes, or high blood pressure. Within each condition, patients were randomly assigned to either a doctor or a nurse-practitioner. The response variables included measures of the patients' health and of their satisfaction with their medical care after 6 months a) What are the blocks in this experiment: the different diagnoses (asthma, etc.) or the type of care (murte or doctor)? Why? b) Explain why a randomized block design is preferable to a completely randomized design here. 1. According to the popular TV show Mythbusters, the answer is "Yes." In the March 9, 2005, episode, the Mythbusters team presented the results of an experiment involving 50 subjects. All the subjects were placed in a booth for an extended period of time and monitored by hidden camera. Two-thirds of the subjects were given a "yawn seed" by one of the experimenters; that is, the experimenter yawned in the subject's presence prior to leaving the room. The remaining subjects were given no yawn seed. What were the results of the 16 subjects who had no yawn seed, 4 yawned. Of the 34 subjects given a yawn seed, 10 yawned. Adam Savage and Jamie Hyneman, the cohosts of Mythbusters, used these results to conclude that yawning is Yawning study Dot Patio contagious. a) Explain how you could use slips of paper to randomly reassign the subjects to the treatment groups, assuming that the treatment received doesn't affect the response, b) Suppose we used your method in (a) to redo the random assignment 50 times. The Fathom dotplot displays the number of subjects in the yawn seed group who yawned in each of these random assignments. What 6 7 8 9 10 11 12 13 conclusion would you draw about whether yawning is contagious? yawe Explain bobo 2. Nurse-practitioners are nursed with advanced qualifications who often act much like primary care physicians Are they as effective as doctors at treating patients with chronic conditions? An experiment was conducted with 1316 patients who had been diagnosed with asthma, diabetes, or high blood pressure. Within each condition, patients were randomly assigned to either a doctor or a nurse-practitioner. The response variables included measures of the patients' health and of their satisfaction with their medical care after 6 months a) What are the blocks in this experiment: the different diagnoses (asthma, etc.) or the type of care (murte or doctor)? Why? b) Explain why a randomized block design is preferable to a completely randomized design here
