Since then, numerous articles in statistics journals have appeared concerning the precise interpretation of kurtosis. If more flat-topped I term them platykurtic, if less flat-topped leptokurtic, and if equally flat-topped mesokurtic.” Given two frequency distributions which have the same variability as measured by the standard deviation, they may be relatively more or less flat-topped than the normal curve.
“ degree of flat-toppedness which is greater or less than that of the normal curve. To measure departure from normality, and coined the terms “leptokurtic,” “mesokurtic,” and “platykurtic” to indicate cases where kurtosis is > 0, = 0, and < 0 respectively, stating,
