You description of kurtosis as characterizing peakedness or flatness is incorrect. It measures tail extremity only. See Westfall (2014), “Kurtosis as Peakedness, 1905-2014. R.I.P., The American Statistician.
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About 1 year ago

Peter Westfall
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Completed
Feature Request
About 1 year ago

Peter Westfall
Get notified by email when there are changes.