A psychologist at a private mental health facility was asked to determine whether there was a clear difference in the length of stay for patients with different categories of diagnosis. Looking at the last seven patients in each of the three major categories, the results (in terms of weeks of stay) were as follows.Using the data below, test whether the length of stay for patients vary based on category of diagnosis.

Diagnosis Category
Affective Disorders	Cognitive Disorders	Drug-related Conditions
7	12	8
6	8	10
5	9	12
6	11	10
9	11	9
5	10	11
6	9	12

1. In this specific scenario, what is the independent variable? Is it between or within subjects? How many levels does it have, and what are they?

ANSWER The independent variable is emotional arousal. This is a between subject variable and it has three levels.

1. Paste all relevant statistical output in the space provided below:

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2. an appropriate graph in SPSS and paste it in the space provided below?

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1. This includes a full write-up to include a complete statistical notation as shown in the weekly presentations. The write-up also needs interpretation. If significant, state how. If it is not significant, what does that mean in layman's terms?

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1. What is a potential confounding variable in this scenario? Explain your rationale.

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