Q2: Placebo effect of exerciseImagine that Crum and Langer were able to repeat their study from Q1 above, but this timeadding a third group of workers that was given only half of the information compared to theoriginal treatment group. Now the experiment has three groups: the Full treatment group, theHalf treatment group and the Control group. They wish to apply a statistical method to testwhether the level of information provided is associated with a change in the workers' averageBMI four weeks later.a. What is the most appropriate statistical method to answer this question, and why? Provideas many details as possible to justify your choice, using appropriate statistical terminology.b. Write a description of an appropriate null hypothesis in words for the test you described inpart 2a above.c. Next, we examine a different exercise placebo experiment published by Desharnais et al.(1993). The following graph shows average self-esteem reported by a treatment group(EXPERIM) and a control group (CONTROL) against number of weeks since the start of theexperiment. Provide one sentence to describe in words what this graph shows.36SELF-ESTEEM353433231EXPERIM→ CONTROLWK-1WK-4WK-7WK-10WEEKSFig. 1. Self-esteem scores for subjects in the experimental andcontrol conditions at the 1st, 4th, 7th, and 10th weeks ofthe exercise program.d. By what name is this type of plot referred to in the lecture notes and textbook?e. What does the above plot tell us about the relationship between these variables? What arethe implications for the statistical test in part 2a above, and why?

From the given information, the experiment has three groups: the Full treatment group, the Half…

Answered: Q2: Placebo effect of exercise Imagine…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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You’re interested in knowing if a walking plus strength training exercise program results in a significantly greater increase in maxVo2 as compared to a walking only or a strength training only exercise program. Participants are randomly selected and then randomly assigned to one of three groups— walking plus strength training, walking only, or strength training only. After 6-months of exercise the participants are assessed. Which statistical analyses was used?
Q1: Placebo effect of exercise In a high-profile research study, Crum and Langer (2007) performed an experiment to test whether the relationship between physical exercise and health is impacted by one's mindset: in other words, if there is any "placebo effect" of exercise. A sample of 84 randomly selected hotel workers in the United States were placed either into a treatment group (n=44) or control group (n=40) depending on which hotel they worked at. The treatment group was given information demonstrating how their work is good physical exercise, while the control group was not given this information. They measured the body mass index (BMI) for each worker before the experiment and again four weeks after the experiment. a. Are the treatment group and control group independent of each other, and if so why? b. Now consider the treatment group alone: are the measurements of BMI taken before and after the experiment independent of each other, and if so why? c. What is the most appropriate…
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