58 



Table 27.- LEAST SQUARES. 



Values of the factor 0.6746-< 



^\n(u-l) 



. _ , for the probable error of the arithmetic i 



Table 28. -LEAST SQUARES. 



Values of tbe factor 0.8463" 



\n(»— 1) 



2v = 

 This factor occurs in the approximate equation r =0.8453 /- for the probable error of a single observation. 



■f n(n — / ) 



Table 29. -LEAST SQUARES. 



1 

 Values of 0.8453 — :--=-• 

 niijn—1 



Smithsonian Tables. 



