this is theory of statistics (2) from the book Introduction to Theory of Statistics, 4th ed. by Mood, A.M.,Greybill,F.A and Boes, D.C.,Mc Graw-Hill. ch2,3,4,5,6. my final exam will be totally the same with the questions i posted… (Budget: $10-30, Jobs: Engineering, Finite Element Analysis, Mathematics, Natural Language, Statistics)