Table 17 
Distribution of the number of incorrect estimations. All interpreters included. 
  
  
  
  
  
  
= = Deviation from Correct Density (in tenths) 
S © : ETE us -| Total 
$ i£ lolosi 12]15|20/25| 20| 25| 4o] 45) 5.0 | 5.5| 6.0] 
| Fe | 
06/8/5958) 6/0) 3) gf al, Le il sr 
3 3/9) 9/12 10 11| 7! 7/5) € | FII. 74 
© Total 14 | 18 | 24 | 16 | 20 | 10 | 13 | 4 7 | a 1 2) tai 
+ | % |11/14/ 18 /12/15/| 8110/8516512 1; 1! 100 
[+ - 7 718 5/11 1/18 2/7 1110 —3 —5 —2 — 11 —178 16 
H 29} 7) 26 | 5; 17/ = | 8 (cla fe 95 
= 6 |.19 | 111 16 4 1 4 6 2 3 - 1 66 
SU Ss | 8/10) 17 | 9}12|11/. 51.95) alt 79 
R [Total 49/25) 59 18 5 15 18 | 210 — 11 3 240 
120112125 | 7161 61 Bl dl Mila 100 | 
+ — | 5 7/15 1015 2/128/6 — 53 8 — 31 Lite} on 54 26 | 
H|28 | 9] 97 | 319] 11 «1| 11 97 | 
bo 8/'8 12 {48/6} el 1 | 1 | 8 58 
£isisisi swiuio!:sd1lsl.- 75 
5 rot |B | BB | di lie | 81 | 4| 9| 1| 2 930 
"i*€ 119111! 90 '8/18| 7/9 Salil à 100 | 
E 65/187/53|14461 812—381 9 59 22 | 
The systematic errors are relatively small and are of the same 
order of magnitude, approximately, as for the measurements. 
There is no marked trend in any direction. The mean square 
errors vary slightly and do not show a marked trend either. 
There is, however, a clear difference between the results of the 
interpreter III and the other two interpreters. The mean square 
error of the interpreter III is not greater than was obtained in 
measuring with stereometer. 
The sources of error affecting the horizontal parallaxes (dealt 
with in connection with the measurements) will also influence 
the estimation of heights. The magnitude and the effect of the 
errors will depend on the position of the estimated stands in 
relation to the sample areas. In the estimations performed the 
influence of these errors can be considered as unimportant. 
N 
~1