I'm a DATA scientist, and i've done many DATA mining and statisctical analysis projects. I propose to test first the quality and reliability of the DATA by detecting the outliers and proceeding by some statistical tests. The second step i'll use a comobination between the quantitative and qualitative methods to Analyse your DATA base. i mention that i'm certified in Ms Excel
Also you may choose the software that you want to use (MINITAB, SPSS, R, SAS, STATA) and for the reporting (MS Word, LATEX)