01229nam a2200313 i 450099100066669970753620020503194154.0940614s1983 us ||| | eng 0471887196b10111335-39ule_instLE02520095ExLFac. Economiaita001.42Cochran, William Gemmell460561Planning and analysis of observational studies /William G. Cochran ; edited by Lincoln E. Moses, Frederick MostellerNew York [etc.] :Wiley & Sons,c1983xiii, 145 p. ;24 cm.Wiley series in probability and mathematical statistics. Probability and mathematical statisticsAnalisi della varianzaRicerca scientificaStatisticaMetodiMoses, Lincoln E.Mosteller, Frederick.b1011133517-02-1727-06-02991000666699707536LE025 ECO 519.5 COC01.0112025000000223le025-E0.00-l- 00000.i1013022627-06-02Planning and analysis of observational studies198009UNISALENTOle02501-01-94ma -engus 01