The Statistic Analysis For Unbalance Data

In paper[1-2], Several methods of parameter estimate about Longitudinal unbalance data modling.And there are also some processes to unbalance date in many other documents.An outline of this subject based on previous studies in this paper.then,the author build a simple model ,fit the random data to identify the pros and cons of these data,and make prospect to the study of this problem.There are four chapters in this pater. The first part is introduction which tell us about the conception of unbalance data, and the methods use median number was introduced in chapter 1.The author made an attempt at dealing with the unbalance data in median number.In chapter 2,estimate methods were quotated ,and evaluation was given by modling .In the third chapter ,some examples were quotated to identify the pros and cons of these random data .