Some people believe that wearing copper bracelets is a good treatment for arthritis of the hand. To test this belief, suppose you recruit 100 people and supply them all with copper bracelets. After the patients wear the bracelets for a month, you ask them whether or not their pain is less than it was before they began wearing the bracelets. Explain how to improve this study.
Answer to relevant QuestionsA group of overweight people are asked to participate in a weight loss program. Participants are allowed to choose whether they want to go on a vegetarian diet or follow a traditional low-calorie diet that includes some ...A 2009 study analyzed data from the National Longitudinal Study of Adolescent Health. Participants were studied into adulthood. Each study participant was categorized as to whether they were obese or not and whether they ...The dotplot shows body mass index (BMI) for 134 people according to the National Health and Nutrition Examination Survey (NHANES) in 2010, as reported in USA Today. a. A BMI of more than 40 is considered morbidly obese. ...Match each description with the correct histo gram (A through C). 1. Heights of students in a large UCLA statistics class that contains about equal numbers of men and women. 2. Numbers of hours of sleep the previous night in ...A StatCrunch survey asked people whether they preferred cats or dogs and how many pets they had. (Those who preferred both cats and dogs and those who preferred another type of pet are not included in these data.) Make two ...
Post your question