Question

Problem Set 2: Linear Regression Analysis Research Scenario: A social psychologist is interested in whether the number of days spent in a refugee camp predicts trauma levels in recently resettled refugees. He interviews 17 refugees to determine how many days they spent in a refugee camp before being resettled, then administers the Harvard Trauma Questionnaire Part IV (HTQ Part 4), where a higher score indicates higher levels of trauma (Mollica et al., 1992). He compiles the information in the table below. Using this table, enter the data into a new SPSS data file and run a linear regression analysis to test whether days in a refugee camp predict HTQ-4 scores. Create a scatterplot with a regression line to show the relationship between the variables.

Days Spent in Refugee Camp	HTQ Part 4 Score
12	0.4
73	1.1
60	0.9
105	2.3
98	1.7
76	0.3
89	0.7
173	2.6
189	3.1
203	3.0
138	1.9
215	2.5
71	0.7
67	1.2
63	1.8
184	2.9
63	0.6

1. Paste SPSS output. (7 pts)
2. Write an APA-style Results section based on your analysis. Include your scatterplot as an APA-style figure as demonstrated in the APA writing presentation. (Results = 8 pts; Graph = 5 pts)

Answer 1

SPSS output is

Descriptive Statistics

               Mean Std. Deviation   N

Score        1.629       .9674           17

Refugee   110.53      60.810          17

Correlations

                                             Score    Refugee

Pearson Correlation Score          1.000    .882

                                  Refugee     .882       1.000

Sig. (1-tailed)            Score           .           .000

                                 Refugee    .000        .   

N                              Score           17          17

                                 Refugee       17          17

Model	R	R Square	Adjusted R Square	Std. Error of the Estimate
1	0.881697	0.77739	0.76255	0.471427

Model		Sum of Squares	df	Mean Square	F	Sig.
1	Regression	11.64165	1	11.64165	52.38254	2.89E-06
	Residual	3.333644	15	0.222243
	Total	14.97529	16

Model		B	Std.Error	Beta	t	Sig.
1	(Constant)	0.079	0.243		0.325	0.749
	Refugee	0.014	0.002	0.015	7.238	0.000
	a. Dependent Variable: Score

As we see that days in a refugee camp has a significinat impact of HTQ-4 scores