selecting the appropriate number of segments by a chance procedure 

 that insured geographic distribution of the segments." ** 



Pennsylvania, Maryland, Delaware, and West Virginia {Areas 15, 

 16, 17, 19, 20) . The producing unit was a farm classified by census defin- 

 ition. The universe of farms consisted of dairy, livestock, and crop farms, 

 with the exception of specialized fruit, vegetable, and poultry farms. 

 The number of farms (other than specialized) was determined for each 

 township from the 1959 census. The sampling unit consisted of a town- 

 ship, or portion thereof, containing more than 10 farms but less than 

 30 dairy or potential dairy farms. Ideally each segment would consist 

 of 20 farms. However, segments of farms were formed on a township 

 basis because this was the smallest geographical unit for which the 

 number of farms could be estimated. No segments cut across township 

 lines 



Sampling units or segments were grouped into blocks. A block con- 

 sisted of 800 farms in Area 15, 1.000 farms in Areas 16 and 17, and 1,333 

 farms in Area 19. A block in Area 16 would contain 50 segments 



Table 3. Total Dairy' and Potential Dairy Farms, Sample Rate and 

 Number of Farms Sampled by Area and State for the Northeast, 1960 



\ 



"Ibid. 



14 



I 



