what is the most useful measure of population spread? difference between iqr standard deviation which is the more useful measure for comparing variation between populations? what is the more useful measure in population distributions? which is the more useful measure for comparing the variation between populations? what measure is used to measure the variability of two different populations what is a standard deviation compared to an iqr what is the difference between median and standard deviation what is the robust measure of sampling variability? which is the more useful measure to measure variation? what is iqr vs standard deviation which is robust measures comparing variances difference between iqr and standard deviation definition iqr/standard deviation what is a coefficient of variance compared to standard deviation? what's the difference between a standard deviation and a coefficient of variation which is the more useful measure of variance? what is the most useful measure of variance which measures the variability of populations? which is a robust measure for comparing variation within a population?