420 



Journal of Agricultural Research 



Vol. III. No. s 



T.4BLE IV. — Comparison of the graduation of data on H ohlein-F riesian cows by different 



methods 



13. 



14- 

 IS- 



16. 



17- 

 18. 

 19- 



23- 

 24- 

 25- 



26. 



Total. 



By least squares. 



By moments. 



y from 

 data. 



290. 6 

 316.7 

 347-0 

 376.0 

 407.9 

 428.2 



447-1 

 457-2 

 464. 2 

 466-3 

 468-0 

 466-6 

 466.6 

 467-0 

 466-6 

 464. 6 

 462.5 

 460.7 

 460. 2 

 455- 2 

 453-7 

 449- I 

 444- o 

 443- 2 

 448.7 

 440. o 



y from 

 curve. 



272. 1 

 332.2 



366.9 

 391. 1 



409. 2 

 423-4 



434-7 

 443-8 

 451-2 

 457-7 

 461- 6 

 46s- I 

 467-5 

 469-0 

 469-6 

 469-4 

 468.5 

 466-9 

 464- S 

 461-5 

 457-9 

 453-7 

 448-9 

 443-5 

 437-5 

 431.0 



•fl8.5 

 -■5-5 



— 19.9 



— 15- 1 



— 1-3 

 + 4.8 

 -fj2.4 

 + 13-4 

 + 13.0 

 -f 8.6 

 + 6.4 

 + t-S 



— -9 



— 2. o 



— 3-0 



-4-8 

 -6.0 

 -6.2 



— 4-3 



— 6-3 



— 4.2 

 -4-6 

 -4.9 



— -3 



4-II.2 



-^ 9. o 



198. 1 



342- 25 

 240. 25 

 396. 01 

 228.01 

 1.69 

 23-04 



IS3- 76 



179- 56 



169- 00 



73-96 



40-96 



2. 25 



.81 



4.00 



9.00 



23.04 



36.00 



38.44 



18.49 



39.69 



17.64 



21. 16 



24.01 



•09 



125.44 



81.00 



Ordinates at criual 

 inten'als. 



Ordinates at unequal 

 intervals. 



J- from 

 curve. 



2,289.5s 



260- 1 

 331-9 

 371-2 

 397- I 

 415-5 

 429. 3 

 439-8 

 447-8 

 454.0 

 458.6 



462. o 



464. 4 



465. 8 

 466.6 

 466.6 



466. o 

 464.9 



463. 2 

 461. 1 

 458.6 

 455-7 

 452-4 

 448.8 

 444.9 

 440. 7 

 436. 2 



+30.5 

 -15.2 

 —24.2 



— 21. I 

 -7.6 



— 1. 1 

 + 7-3 

 + 9-4 

 + 10. 2 

 + 7-7 

 -*- 6-0 

 -4- 2.2 

 + .8 

 + -4 



o 

 -1-4 



— 2.4 

 -2-5 



— -9 

 -3-4 



— 2.0 



— 3-3 

 -4-8 



— 1-7 

 + 8.0 

 + 3-8 



930- 2S 

 231-04 

 585. 64 



445-21 



57-76 



I- 21 



53-29 



88.36 



104. 04 



59-29 



36.00 



4-84 



.64 



.16 



O 



1.96 

 5-76 

 6. 25 

 .81 

 11.56 

 4.00 

 10. 89 

 23.04 

 2.89 

 64.00 

 14.44 



177-9 2f743-33 



curve. 



187.0 



1,017. 61 

 146. 41 

 441-00 



334-89 



31-36 



.01 

 60-84 

 81.00 

 84.64 

 36.00 

 14.44 



.16 

 4.84 



7.29 

 9. 61 

 19.36 

 27.04 

 25.00 



7.84 



22. 09 



6- 25 



8.41 



10.89 



I- 21 



151.29 



92. 16 



2,641.64 



Least squares: Root mean-square error=9. 4; mean error= 7.6. 



Moments, equal intervals: Root mean-square error= 10.3; mean error=6.8. 



Moments, unequal intervals; Root mean-square error= 10. 1 ; mean eiTor= 7.2. 



In Table V are given the values of the fs and certain other constants 

 involving only / for values of / from 3 to 40. This range will include 

 practically all cases likely to occur in ordinary statistical work. 



The author wishes to acknowledge his indebtedness to Dr. Pearl for his 

 aid and suggestions throughout the work. 



