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## 15 May Stress Disorders Following Deployment

Stress Disorders Following Deployment

Many men and women in the US military are required to make multiple deployments to war zones.  Each deployment can last up to a year or longer, having lasting effects on stress to soldiers and their families.  To better understand the extent to which multiple deployments may increase the hardships on those serving in war zones, a researcher asked a group of soldiers who had served four deployments in a war zone to indicate whether their first, second, third, or fourth military deployment was the most stressful.  Frequencies were expected to be the same in each category.  The frequency of soldiers choosing one of four categories is given in the table.  Test whether the frequencies observed are different from frequencies expected at a .05 level of significance (assume equal frequencies).

Number of Deployments to War

 1 2 3 4+ Frequencies observed 22 36 34 36

Output file: 5 points

1. Based on the value of the test statistic, what is the decision for the chi-square goodness-of-fit test?  Retain or Reject the null hypothesis? 1 point

2.  Based on the data given in the SPSS output, state the frequency observed and the frequency expected for each level of the categorical value. Make sure you label a group name for each level of the categorical value. (12 points)

 Level of Factor (k) Frequency Observed Frequency Expected ______________ _________________ _________________ ______________ _________________ _________________ ______________ _________________ _________________ ______________ _________________ _________________

3. Based on the SPSS output, state the following values for the test statistic (1 point each):

Total sample size:

Chi-square test statistic:

Degrees of freedom:

Significance:

4.  State the conclusion for this test using APA format.  Provide an interpretation for your conclusion. (1 point)

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