PHYSICAL AND PHYSIOLOGICAL MEASUREMENTS. 



77 



lation is, however, positive in sign, indicating that taller individuals 

 have a more rapid pulse. If, however, one turns to the Gephart and 

 Du Bois selection of male subjects he finds a negative correlation of 

 the order r= 0.15, thus indicating that the taller men have a less 

 rapid pulse. This is also the relationship suggested by the constants 

 for the women, who give a consistently negative but statistically 

 insignificant correlation. 



Inspection of the means obtained without grouping the values for 

 stature as given in diagram 7 for the total available men (N = 121) 

 and for the total available women (TV = 90) shows (a) how widely 

 scattered the average pulse-rates for any given stature are, an<T(&) 



65 



60 



ss 



so 



45 



c^n~7^T/', ; , \: 

 ^ ; ; i k y '' 



;'. '" 1 1 



r-H- 

 T, ; ; ; 



'i ii 





14-8 153 



IS8 



/63 /68 173 I7S 133 A?? 133 



STATURE IN CENTIMETERS 



DIAGRAM 7. Variation of mean basal pulse-rate with stature in men and women. Note 

 extreme irregularity of means and different slopes of the straight lines in the two sexes. 

 Compare diagrams 5 and 6 for body-weight and pulse-rate. 



how slight is the change in average pulse-rate associated with differ- 

 ences in stature. The straight lines in the diagrams are due to the 

 equations : 



For men N = 12l p = 47.7179+0.0783 a 



For women N= 90 p = 86.0430 -0.1073 a 



If the relationship between stature and pulse-rate be corrected for 

 the correlation of weight with stature, we find the partial correlations 

 between stature and pulse for constant weight, like the uncorrected 

 correlations, are low in magnitude and irregular with regard to sign. 

 The exception is the athletes, but these are too few in number to justify 

 attaching much significance to the probable errors of the constants. 



The partial correlations between stature and pulse-rate for constant 

 age are given by 



a.' sp 



y - T* 7* 



1 sp ' as ' ap 



Vl-r * A/l-i 



ap 



The results obtained by applying this formula appear in the final 

 column of table 18. 



