Hello Glorya13,
I've worked in large statistical sets in the biomedical and epidemiological field and with huge numbers of projects in medical and other image and data analysis, even geographical data, financial and other time series, and lots of nonlinear dynamical systems in physics and neuroscience. I have an extensive experience in how to apply and interpret statistical, machine learning, data mining, pattern recognition etc. to real world problems. You can check out in my portfolio for selected numbers of scientific papers I've written.
In addition I am myself a researcher so I am very used to problem sets and fresh data, and have a good experience in how to tweak and preprocess it to maximize information content while reduce unwarranted sources of errors. I am a very good teacher as well, so I believe it might be helpful for you to work together on this project.
If you are interested in working with me, and need more information about how I approach problems, please provide some detailed info on the data, so that I can send you a data specific recommendation for this project. I work for $30-50/hour, but I am fast, and usually this type of single dataset problem can be solved and a report written within a few hours, less than a day. But without seeing the data I can only provide vague estimates of the bid.
Thanks for the trust, and
best wishes
Marton