Statistical methods :
Gupta, S. P. 
Statistical methods : contains, besides theory...with answers / S. P. Gupta. - 23rd edition. - New Delhi : Sultan Chand & Sons , 2004. - xxiv, 1468 pages : illustrations ; 25 cm.
Includes bibliographical references .
8180542114
Statistics.
519.5 G896s 2004
                        Statistical methods : contains, besides theory...with answers / S. P. Gupta. - 23rd edition. - New Delhi : Sultan Chand & Sons , 2004. - xxiv, 1468 pages : illustrations ; 25 cm.
Includes bibliographical references .
8180542114
Statistics.
519.5 G896s 2004