why use standard deviation instead of absolute deviation when to use the pooled standard deviation how to use cohen's d why do we use sds instead of absolute deviations why do we use the sds in cohen's d do mn and sd equals the d mean in social science why use the standard deviation of mean absolute deviation what is the difference between a normalized standard deviation vs a mean absolute deviation why use average deviations instead of normal deviations what is mean absolute deviation in effect size how are standard deviations used for effect size? why do you use standard deviation as the standard deviation in calculating effect size? why is pts mean absolute deviation a better unit of measure why use mean absolute deviation what is difference between standard deviation and absolute deviation what are the difference between standard deviation and mean absolute deviation in social science can sd be used as absolute deviation how do we determine effects of cohen's test difference between norman's d and cohen's d why use mean absolute deviation and standard deviation