Two Different Depression Scales Example 1.28 introduces a study examining the impact of diet on depression. The study used twodifferent ways to measure depression. One is the DASS (Depression, Anxiety, and Stress Scale) which uses self-reported symptoms,while the other is the CESD (Centre for Epidemiological Studies Depression Scale), which is a more involved clinical assessment. Onboth scales, higher numbers indicate greater depression symptoms.We are interested in whether we can use the self-reported data asa good predictor of clinical results (and hence a good starting point for patients). Figure below shows a scatterplot of the twodepression scores for each of the 75 participants at the start of the diet/depression experiment (before the effect of any dietaryintervention.)706050403020101020.30405060Self-reported(a) Does the association appear to be positive or negative?(b) Describe, in the context of this situation, the characteristics of a case in each of the following possible locations on the scatterplot:(i) The upper left(ii) The upper right(iii) The lower left(iv) The lower right(c) For the case farthest to the right on the scatterplot, estimate the score on the self-reported scale. Estimate the score on the clinicalscale.Self-reported score =iClinical score =iClinical

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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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I want to assess the effects of diet (control diet, high-sugar diet, high-fat diet) and exercise (no voluntary running wheel, voluntary running wheel) on time spent in a target quadrant (more time indicates better memory). I record the percent time spent in a target quadrant for 30 mice and obtain the following data: Control Diet High-sugar Diet High-fat diet No running wheel 15, 28, 29, 30, 25 24, 20, 30, 32, 20 19, 23, 22, 23, 25 Running wheel 30, 34, 35, 44, 32 21, 22, 28, 26, 29 30, 32, 28, 19, 26 What type of factorial design is this? (ex: # x #) ______________ What is the critical F value you’ll be making a decision based on (assume alpha = .05)? Diet: ____ Exercise: _____ Interaction: ______
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