48 



American Statistical Association. 



was made before the training began, or in the early part of 

 the training ; the second observation was made seven months 

 later. During the intervening period, i, e., from October to 

 May, the students had one hour's gymnastic training five 

 days a week, besides attending the required lectures and 

 recitations. The ages of the students range from seventeen 

 to forty-two years. The distribution of age at the beginning 

 of the training is shown in the following table: — 



TABLE I. Age at the Following Percentile Grades. 



Height. The highest and lowest statures of these 100 stu- 

 dents were 171.3 and 147 centimetres, respectively. Table II 

 shows the distribution of height before and after the training. 



TABLE II. Height. 



Weight. The highest and lowest weights observed in 

 these cases are, before the training, 74.3 and 40.2 kilos., respec- 

 tively ; after the training, 72.9 and 38.4 kilos., respectively. 

 Table III shows the value of the following percentile grades 

 before and after training : — ^ 



TABLE III. AVeight. 



