TABLE 26. 

 LEAST SQUARES 



Values of the factor 0.6745 



49 



_--. 



This factor occurs in the equation e = o.6j4$\ ^ for the probable error of the arithmetic mean. 



\ n(n i) 



TABLE 27. 

 LEAST SQUARES. 



Values of the factor 0.8453-v/ * 



This factor occurs in the equation e t = 0.8453 



for the probable error of a single observation. 



TABLE 28. 

 LEAST SQUARES, 



Values of 0.8453^ 



This table gives the average error of the arithmetic mean when the probable error is one. 



SMITHSONIAN TABLES. 



