00278nam a2200133Ia 4500020000900000082000800009100001700017245004000034250000800074260002700082300001400109500000600123650001500129  aNULL  a519  aGupta, C. B. 0aIntroduction To Statistical Methods  a7nd  aDelhibVikas Prakashan  a457 , 107  a0  aStatistics