health educator wants to evaluate the effect of a dental film on the frequency with which children brush their teeth. A random selection of 8 children are used for the experiment. First, a baseline of the number of times the children brush their teeth over a month's period is established. Next, the children are shown the dental film and again the number of teeth brushings are recorded for a month. The following data are recorded.   Subject 1 2 3 4 5 6 7 8 After film 28 29 25 30 25 27 28 24 Baseline 25 28 22 30 26 24 25 22   18. Refer to Case Study 14-2. Using α = 0.052 tail, what do you conclude? a. retain H0; the film has no effect on the frequency of tooth brushing b. reject H0; the film affects the frequency of tooth brushing c. accept H0; the film has no effect on the frequency of tooth brushing d. reject H0; chance alone is a reasonable explanation of the data

Give 5 examples of situations using this:  1. Retrospective Study 2. Observational Study 3. Designed Experiment

Seattle Grace Medical Center. As part of a long-term study of individuals 65 years of age or older, doctors at the Seattle Grace Medical Center in Washington state investigated the relationship between state of residence and depression. A sample of 60 individuals, all in reasonably good health, was selected; 20 individuals were residents of Texas, 20 were residents of Washington state, and 20 were residents of South Carolina. Each of the individuals sampled was given a standardized test to measure depression. The data collected follow; higher test scores indicate higher levels of depression. These data are contained in the attached data file SeattleGrace1. A second part of the study considered the relationship between state of residence and depression for individuals 65 years of age or older who had a chronic health condition such as diabetes and/or high blood pressure. A sample of 60 individuals with such conditions was identified. Again, 20 were residents of Texas, 20 were residents…

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