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April 16, 2014

Homework Help: Biostatistic

Posted by nono on Tuesday, December 11, 2012 at 11:43pm.

A study is conducted in a patient with HIV.Lower CD4 count is associated with advance disease. A researcher is interested in the association between vitamin supplement and CD4 count.A MULTIPLE REGRESSION ANALYSIS is performed relating CD4count to the use of supplements(coaded as 1=yes, 0=No)and to the duration of HIV in years(i.e, the number of years between the diagnosis of HIV and the study date). For the analysis,
y= CD4count
y hat= 501.41+12.67(supplement)-30.23(duration of HIV).
a) What is expected CD4 count for patient taking supplement who has had HIV for 2.5 yyears?
b) what is expected CD4 count for patient not taking supplement who was dignosed with HIV at study enrollment?
c) what is expected CD4 count for patient not taking supplement who has had HIV for 2.5 years?

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