KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 58. N:0 3. 



The arrays headed x y — m l ; o v (%); y.c — rn\,a%{y) are expressed in the class ranges 

 as units. Those are 300 and 80 gr. 



Table II. 



Weight of 

 placenta 



Weight of boy 



Total 



x« — to} 



<4(*) 



1710- 

 — 2000 



2010— 

 —2300 



2310— 

 — 2600 



2610— 

 —2900 



2910— 

 —3200 



3210— 



—3500 



3510— 

 —3800 



3810— 

 —4100 



4110— 

 —4400 



4410— 

 —4700 



4710— 

 — 5000 



270—340 



1 





2 





1 















4 



— 3,000 



2,00 



360—420 



2 



10 



8 



25 



21 



14 



2 











82 



-1,743 



1,91 



430—500 



o 



2 



12 



34 



94 



77 



37 



10 



2 







270 



— 0,567 



1,59 



510-580 





1 



4 



17 



55 



111 



84 



37 



10 





1 



320 



+ 0,275 



1,55 



590—660 





1 



3 



6 



24 



51 



92 



78 



22 



3 





280 



+ 0,989 



1,06 



670 -740 





2 



1 



2 



4 



15 



40 



51 



24 



8 



4 



151 



+ 1,636 



2.25 



750-820 











2 



8 



13 



26 



20 



11 



3 



83 



+ 2.193 



1,80 



830—900 













4 



1 



8 



3 







4 



26 



+ 2,692 



2,59 



910—880 













1 



1 



3 







2 





+ 2,428 



3,10 



Total 



5 



16 



30 



84 



201 



281 



270 



213 



81 



28 



14 



1223 







yx-ml. 



-2,800 



-2,060 



-1,967 



— 1.880 



-1,502 



-0,925 



-0,-<37 



+0,385 



+0,728 



+ 1,714 



+ 2,071 









"x{y) 



0,56 



2,07 



1,35 



0,99 



0,98 



1,44 



1 ,25 



1,50 



1,30 



0,85 



1.79 









m\ = 3350 gr. 

 to, = 3490,55 



mh = 630 gr. 



m., = 584,28 



The moments (corrected for grouping) were found to be, as expressed in the 

 class range unit: 



» / 20 = + 2,8346 l' n = + 1,5629 >'„, = + 2,0684 



V ao = — 0,6298 V 2l = + 0,2615 V l2 = +0,5245 



V ia = + 26,4017 ''ai = + 13,2361 )',, — + 10,3 4 85 V i3 = + 8,6632 



// 03 == 4- 1,435 1 

 r gi = + 12,3621 



and the characteristics with mean errors 



"", = + 1,6836 ± 0,03 tO /' -— 



/9 30 — + 0,0220 ± 0,0 1 1 6 

 ,/_,, = — 0,0.32 1 +_ 0,(14 20 



/J 1;! = 0,0753 ± 0,0420 



/? 03 = — 0,0 8 04 ± 0,0 1 1 6 



+ 0,64 5 5 ± 0,0 16 7 O, — + 1,438 1 +_ 0,029 1 

 lUa = + 0,01 19 +_ 0,0058 

 ,<';,. = — 0,00 13 ± 0,0175 

 (i 22 - + 0,0170 ± 0,02 10 

 ,)' 13 = — 0,034 5 + 0,0175 



('04 



= — 0,0046 ± 0,0058. 



The correlation coefficients of higher order are 



r 30 = — 0,0747 ± 0,04 r i0 = — 0,0320 ± 0,02 



?- 03 =+ 0,0804 ± 0,04 r 0i — — 0,0227+0,02. 



