SUMMARY 

 This study may be summarized as follows: 



1. More than half of the children, 59.2% of the boys and 

 56.2% of the girls, applied for employment certificates im- 

 mediately upon satisfying the requirements of the law as to 

 age and school grade. 



2. The average height of boys 14 to 15 years old is 61.55 

 inches; of boys 15 to 16 years old, 62.74 inches; of girls 14 to 15 

 years old, 61.19 inches; of girls 15 to 16 years old, 61.59 inches. 

 In each of these two years the stature of boys is greater than 

 that of girls. 



3. The boys are distributed over a greater range of heights 

 than the girls. The interquartile range, that is, the limits 

 which include the central 50% of the cases, is 4.26 inches for 

 the boys and 3.05 inches for the girls. 



4. In the period between the first quarter of the fifteenth 

 and the last quarter of the sixteenth year, the boys show an 

 increase in height of 2.01 inches and the girls only .71 inch. 



5. The average weight of boys 14 to 15 years old is 103.38 

 pounds; of boys 15 to 16 years old, 109.69 pounds; of girls 

 14 to 15 years old, 104.54 pounds; and of girls 15 to 16 years 



.old, 107.57 pounds. 



6. The boys are distributed over a greater range of weights 

 than the girls, their interquartile range being 23.7 pounds, as 

 .against 19.83 pounds for the girls. 



7. In the period between the first quarter of the fifteenth 

 and the last quarter of the sixteenth year, the boys gain 10.56 

 pounds and the girls gain only 3.61 pounds. 



8. The coefficient of correlation between height and weight 

 for boys 14 to 15 years old is .776; for boys 15 to 16 years old, 

 .759; for girls 14 to 15 years old, .499; for girls 15 to 16 years 

 old, .439. The coefficients of correlation are higher for boys 

 than for girls; and for both sexes the coefficient is higher in 

 the first than in the second year under consideration. 



9. Up to about 63 inches, the girls are heavier than the 

 boys for the same height; but beyond that height, the boys 

 are heavier than the girls. 



10. For the two-year period 14 to 16, taken as a unit, the 

 children in higher grades are taller than those in lower grades. 

 Among boys, graduates are taller by .18 inch, and high school 

 boys by .48 inch, than those in grade 7A. Among girls, gradu- 



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