Hello, I'm

I would like to study the residuals between Ischemic (IHD_DX) and Systolic Pressure (SBP).

Starting hypothesis :

H0 IHD_DC is bounded to the SBP

H1 IHD_DC is not bounded to the SBP.

My analysis :

## Confident interval (CI)

icResSBP_IHD=t.test(ResSBP_IHD,conf.int=TRUE, conf.level=0.95)

icResSBP_IHD$conf.int

## Residue analysis

RegSBP_IHD<-lm(SBP_50~IHD_DX, data=coeur)

### Linear regression

ResSBP_IHD<-rstudent(RegSBP_IHD)

### Graphic analysis

plot(ResSBP_IHD, ylab="Résidus")

abline(h=c(-1.14,0,1.15), lty=c(2,1,2))

### Summary

sum(ResSBP_IHD)

sum = 0,78.

My question is : 0,78 mean that 78 % of residual belong to the CI ? So, did 78 % of patients have an ischemic linked to the systolic pressure ? Or, in the 78 % of the case, did the systolic pressure may a factor of the ischemic ?

I don't know how to read into residuals.

Best regards,