MEASUREMENTS OF RELATIONSHIPS 



43 



lationship in the latter case (70.5 being taken as the central tend- 

 ency) is closer, the Median Ratio being .54 or about 7 higher than 

 the Median Ratio when divergences are calculated from 56.5. The 

 Modal Ratio is unchanged. 



It should be evident from the facts stated in previous sections 

 that it is out-and-out folly to be content with calculating for 

 every relationship studied the same type of coefficient. Nothing 

 short of the entire correlation table is the adequate measure of the 

 relationship in question. Any measure of one central tendency of 

 relationship may be misleading, for the relationship may be bimodal. 

 When the observed modal relationship is clearly not near the Pear- 

 son Coefficient the latter should be accompanied by the former. So 

 also if the modal relationship is clearly not near the median rela- 

 tionship. 



The averages or medians or modes of the arrays should be cal- 



FIG. 10. 



