I] 



Introduction 



\ x v 



of o- y , have been found by Table I of Part i of this book ; these form Column (k). 



Column (1) gives the partitional ordinatea as determined from Table I of the 



nt Part II of these tables. Column (m) gives simply the difference of 



these ordinates, and Column (n) gives in terms of <r v , the standard deviation of y, 



HEALTH OF BABY AT A YEAR & AT BTRTH 



2-0 



a 1 * 



3V 



3 



CO 



0-0 



3 



-1-0 



-2-0 



UNSATISFACTORY 



INDIFF 

 -ERENT 



NORMAL 



ii 



j i ' i ' 



SATISFACTORY 



-2-O -i-O 0-0 



Health of 



' 



1-0 



2-0 



the abscissae of the means of the broad categories of health at a year. They are 

 found by dividing (m) by (t), since 



is the abscissa of the mean of the slice of the normal curve between the ordinates 

 at y ttS+ i and y_i >8 . 



B. n. d 



