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3. Suppose you were conducting a study to investigate the effects of an exercise program on a participant's weight. The participants will be coming in weekly to be weighed. Describe how reliability might be a factor in this study. 4. You collect information on a random sample of women and obtain estimates on vitamin D exposure. However, the results that you find are different than those conducted at another study site. Should you be concerned? Explain your answer using the concept of sampling variability. 5. You are reviewing a publication, and the authors provide a statistic in the results section. It has a large p-value. The discussion section states that, even though the p-value indicates that the null parameter cannot be rejected, the research hypothesis may still be true because the study had low power. Why does low power cause the authors to contradict the conclusion provided by the p-value