While the observed datum's number is less than the charactert'snumber the results of stepwise regression using program are not stable because ofexceeding the limit of D.F. to set regression equation using computer program.It can't control the number of selected characters to adjust the criterion of selec-ted and delected characters, but it's rational and correct to control the numbersof selected characters through selecting them again according to the contributionratio of selected characters based on the results of stepwise regression in the lowerlevel of ɑ....