Methods For A Class Of Problems” Studies& Commercial Research Benha University “A Comparative Study Between Bootstrap & Other Statistical Methods” L Egypte Contemporaine Vol [432] “Bootstrap Method : A Solution of Variance Estimation Problem in Factor Analysis.”29th Conference of Statistics ,Computer Science & Operation Research- Cairo University Vol 29 “ Bootstrap Estimates of Multi – Period Forecasting Error “Studies& Commercial Research Benha University “Bootstrapping proposed estimator for the robust correlation coeffiecient, Scientefic journal,Faculty of commerce, el Azhar university” “Using goal programming in the input-output table analysis,13th conference of statistic and simulations in sotial science,Faculty of economic and political science 23 “Using a stochastic goal programming in ubdating the input-output table with application to Egypt,Egyptien statistical journal-inistitute of studies and statistical research,cairo university vol.46 no.2” “Bootstrapping fuzzy c-means clustering of partially missing data sets,scientific journal,el azhar university,faculty of commerce no.21” a neural network model to forecast time series.A study using obstetric ultra sound data,Nahda journal,faculty of economic and political science,cairo university no.20” “Improved Fuzzy c-means clustering with applications for patients of iron deficiency anemia discrimination,egyptien statistical journal,Institute of studies and statistical research, cairo university “Evaluation of neural network forecasting method, A comparative study with application, Elnahda journal,faculty of economic and political science.Cairo university,vol.7,no.1”