CASE STUDIES IN BIOMETRY: Chapter 6. 

Geostatistical Estimates of Scallop Abundance
                        
Mark D. Ecker and James F. Heltshe                                 
        
The file ch6.dat contains the following variables. 


STRATA : National Marine Fisheries Service (NMFS) 4 digit strata
         designator in which the sample was taken              
                                                                            
SAMPLE : Sample number per year ranging from 1 to approximately 450

LAT  : Location in terms of latitude  of each sample in the Atlantic Ocean      

LONG  : Location in terms of longitude of each sample in the Atlantic Ocean
      
TCATCH : Total number of scallops caught at the ith sample location

PREREC : Number of scallops whose shell length is smaller than 70 millimeters
                         
RECRUITS : Number of scallops whose shell length is 70 millimeters or larger