In Exercise 7.25, we saw data from Everitt that showed that girls receiving cognitive behavior therapy gained weight over the course of that therapy. However, it is possible that they just gained weight because they got older. One way to control for this is to look at the amount of weight gained by the cognitive therapy group (n = 29) in contrast with the amount gained by girls in a Control group (n = 26), who received no therapy. The data on weight gain for the two groups is shown below. Control Cognitive Therapy -0.5 3.3 1.7 -9.1 -9.3 11.3 0.0 0.7 2.1 -5.4 -0.1 -1.4 12.3 -2.0 -1.0 -0.7 1.4 -0.3 - 10.6 -4.6 -3.5 - 10.2 - 12.2 14.9 -3.7 -6.7 3.5 17.1 -7.6 -0.8 11.6 2.8 2.4 -7.1 0.3 12.6 6.2 1.8 1.6 1.9 -0.2 3.7 11.7 3.9 -9.2 15.9 6.1 0.1 8.3 - 10.2 1.1 15.4 -4.0 -0.7 20.9 3.01 7.31 Mean -0.45 St Dev. 7.99 Variance 63.82 53.41 Run the appropriate test to compare the group means. What would you conclude?

In Exercise 7.25, we saw data from Everitt that showed that girls receiving cognitive behavior therapy gained weight over the course of that therapy. However, it is possible that they just gained weight because they got older. One way to control for this is to look at the amount of weight gained by the cognitive therapy group (n = 29) in contrast with the amount gained by girls in a Control group (n = 26), who received no therapy. The data on weight gain for the two groups is shown below. Control Cognitive Therapy -0.5 3.3 1.7 -9.1 -9.3 11.3 0.0 0.7 2.1 -5.4 -0.1 -1.4 12.3 -2.0 -1.0 -0.7 1.4 -0.3 - 10.6 -4.6 -3.5 - 10.2 - 12.2 14.9 -3.7 -6.7 3.5 17.1 -7.6 -0.8 11.6 2.8 2.4 -7.1 0.3 12.6 6.2 1.8 1.6 1.9 -0.2 3.7 11.7 3.9 -9.2 15.9 6.1 0.1 8.3 - 10.2 1.1 15.4 -4.0 -0.7 20.9 3.01 7.31 Mean -0.45 St Dev. 7.99 Variance 63.82 53.41 Run the appropriate test to compare the group means. What would you conclude?

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Description: In Exercise 7.25, we saw data from Everitt that showed that girls receiving cognitive behavior therapy gained weight overthe course of that therapy. However, it is possible that they just gained weight because they got older. One way to controlfor t

Linear Algebra: A Modern Introduction

4th Edition

ISBN:9781285463247

Author:David Poole

Publisher:David Poole

Chapter7: Distance And Approximation

Section7.3: Least Squares Approximation

Problem 31EQ

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