Recent research indicates that the effectiveness of antidepressant medication is directly related to the severity of the depression (Khan, Brodhead, Kolts & Brown, 2005). Based on pretreatment depression scores, patients were divided into four groups based on their level of depression. After receiving the antidepressant medication, depression scores were measured again and the amount of improvement was recorded for each patient. The following data are similar to the results of the study.LowModerateHighModerateModeratelySevere Severe2.40.22.53.51.61.72.74.32.73.423.40.51.25.25.12.42.343.51.80.34.13.8From this table, conduct an one-way ANOVA. Calculate the F-ratio and p-value. Be sure to round your answers to three decimal places. Assume all population and ANOVA requirements are met.F-ratio: _____p-value: _____What is your final conclusion? Use a significance level of α=0.05. (Select one): There is sufficient evidence that there exists a significant difference between treatments.There is not enough evidence to determine a difference between the treatments.

Consider that, µ1, µ2, µ3 and µ4 define the mean depression scores for “Low Moderate”, “High…

Answered: Recent research indicates that the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

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Recent research indicates that the effectiveness of antidepressant medication is directly related to the severity of the depression (Khan, Brodhead, Kolts & Brown, 2005). Based on pretreatment depression scores, patients were divided into four groups based on their level of depression. After receiving the antidepressant medication, depression scores were measured again and the amount of improvement was recorded for each patient. The following data are similar to the results of the study.

Low Moderate	High Moderate	Moderately Severe	Severe
2.4	0.2	2.5	3.5
1.6	1.7	2.7	4.3
2.7	3.4	2	3.4
0.5	1.2	5.2	5.1
2.4	2.3	4	3.5
1.8	0.3	4.1	3.8

From this table, conduct an one-way ANOVA. Calculate the F-ratio and p-value. Be sure to round your answers to three decimal places. Assume all population and ANOVA requirements are met.

F-ratio: _____
p-value: _____

What is your final conclusion? Use a significance level of α=0.05. (Select one):

There is sufficient evidence that there exists a significant difference between treatments.
There is not enough evidence to determine a difference between the treatments.

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