There is Research question - find the relation of hemoglobin(quantitative) and pcv(quantitative) in CKD(qualitative) patients in the given dataset?

what is the impact of increased pcv and hemo on ckd?

Based on these two questions -

which are the research statistic analysis best to find the relation between pcv and hemo(quantitative) and their relation with ckd(ckd is quantitative)?

which model is best to adopt in this scenario?

what predictive analysis is best?