**PLEASE SEE ONLINE ANNOUNCEMENT AND SPSS TUTORIAL FOR MORE DETAILED INSTRUCTIONS
NOTE: Assume we are testing at α = 0.05 for all statistical tests
The local health district conducted a workshop for teenagers to educate them about sexually transmitted infections (STIs). For 16 yearolds, 21 attended; for 17 yearolds, 50 attended; for 18 yearolds, 44 attended; and for 19 yearolds, 40 attended. [DATA: EAB_703_ps9]*
* You will need to weight cases by frequencies first for both of these problems then run by group
Is there evidence to suggest that the number of teenagers who attended were equally distributed across the four age groups? – Hint  use nonparametric, chisq option
Ho:
Ha:
Test statistic and value:
pvalue:
Statistical conclusion:
Written conclusion:
The following table shows 200 males classified according to social class and headache status measured over the past 12 months. [DATA: EAB_703_ps9]*

Social Class 

Headache group 
A 
B 
C 
No headaches 
6 
30 
22 
Simple headaches 
11 
35 
17 
Unilateral headache 
4 
19 
14 
Migraine 
5 
25 
12 
Are social class and headache group related based on these data?
Hint – use crosstabs option
Ho:
Ha:
Test statistic and value:
pvalue:
Statistical conclusion:
Written conclusion:
Skinner et al. conducted a clinical trial to determine whether treatment with melphalan, prednisone, and colchicine (MPC) is superior to colchicines (C) alone in treating amyloidosis. Fifty were treated with C and 50 with MPC. Eighteen months after the last person was admitted to the trial and six years after the trial began, 44 of those receiving C and 36 of those receiving MPC had died. (check out the epimax calculator online tool to get the ORs and 95% CIs here – just fill in the cells at: http://www.healthstrategy.com/epiperl/epiperl.htm)
Complete the following table.

Died 


Yes 
No 
C alone 


MPC 


Compute the relative risk and the 95% confidence interval for relative risk for patients receiving C alone.
RR 

95% CI for RR 
[ , ] 
Provide an interpretation of these values.
Voskuyl et al. investigated patients with rheumatoid arthritis (RA). The investigators were interested in knowing if vasculitis was associated with development of RA in a group of those with RA compared to a group without RA. The subjects were 207 patients, 169 of which had been diagnosed as having vasculits and 38 patients who did not have the condition. There were 32 patients who had been diagnosed as having both RA and vasculitis and 21 patients who had neither condition.
Complete the following table.

RA 


Yes 
No 
Vasculitis positive 


Vasculitis negative 


Compute the odds ratio and the 95% confidence interval for odds ratio for the vasculitis positive patients.
OR 

95% CI for OR 
[ , ] 
Provide an interpretation of these values.
Subject  Mathematics 
Due By (Pacific Time)  11/14/2013 05:00 pm 
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