00661cam a2200217   45000010005000000030003000050050017000080080041000250200015000660350018000810350017000990500020001161000036001362450067001722500012002392600053002513000032003045040051003366500019003877000037004066591UR20220428112419.0800410s19871980iaua     b    00110 eng    a0813815606  a(janium) 6580  a(janium)6580 4aHA29b.S63 19781 aSnedecor, George Waddel,d1881-10aStatistical methods /cGeorge W. Snedecor, William G. Cochran.  a7th ed.  aAmes, Iowa bIowa State University Press c1987.  axvi, 507 p. bill. c24 cm.  aIncludes bibliographical references and index. 0aEstadística.1 aCochran, William Gemmell,d1909-