003340000a22001330004500060000800000082001400008100001500022245004000037250000600077260004600083260000900129300000800138650005400146  a100  a519.5 GUP  aGupta,  CB  aIntroduction to statistical methods  a9  aNew delhi, Vikas Publishing House Pvt Ltd  c1981  a500  aStatistics/ Mathematics/ Correlation/ Probability