Johnston] 



NAVAHO POPULATION 



93 



Table 18. — Enrolled Navaho population for selected agencies, bands, and 



periods— 1910-Si ^ 



1 The data shown in this table were obtained from copies of Navaho tribal rolls. 



* These totals were obtained from the recapitulation sheet or summary report which accompanied each 

 roll when it was submitted by the reporting official. 



3 Sample data were obtained by first selecting a sample of the sheets or pages on which the names were 

 recorded. This was accomplished by selecting every nth page, starting with a randomly selected number 

 between 1 and n. For the smaller rolls, a page interval (n) of 5 was used, while for the larger rolls, the in- 

 terval was increased to 10. The age and sex of each single person listed on a sample page and of each family 

 member whose head was listed on a sample page were recorded. The resultant sample size is approximately 

 equal to the reciprocal of the interval used times the total population. 



« Stacher, MS. a. 



« Paquette, MS. 



6 Janus, MS. 



' Kurth, MS. This enumeration appears to have been carried out with unusual care and competence. 



8 Stacher, MS. b. Although the cover of this roll is dated April 30, the numbered pages of the roU itself 

 are dated June 30, 1930. 



8 Hammond, MS. a. 



i» Hammond, MS. b. 



It should be noted that uncertainty with respect to the actual pro- 

 portion of school-age children to total population has given rise to 

 considerable variation in the total Navaho population estimates that 

 have been made since World War II, when the school censuses have 

 been used repeatedly in arriving at estimates of the total. In one 

 report, for example, the proportion of school age to total Navaho was 



