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types of kurtosis, leptokurtic, mesokurtic, platykurtic
KURTOSIS PEAKEDNESS OF A DISTRIBUTION LEPTOKURTIC: high and thin MESOKURTIC: normal in shape PLATYKURTIC: flat and spread out • KURTOSIS measures how peaked the histogram is • The KURTOSIS of a NORMAL DISTRIBUTION is 0 • KURTOSIS characterizes the relative PEAKEDNESS or FLATNESS of a distribution compared to the normal distribution. PLATYKURTIC When the kurtosis < 0, the frequencies throughout the curve are closer to be equal (i.e., the curve is more flat and wide). Thus, negative kurtosis indicates a relatively flat distribution. LEPTOKURTIC When the kurtosis > 0, there are high frequencies in only a small part of the curve (i.e, the curve is more peaked). Thus, positive kurtosis indicates a relatively peaked distribution • KURTOSIS is based on the size of a distribution's tails. • NEGATIVE kurtosis (PLATYKURTIC) - distributions with short tails • POSITIVE kurtosis (LEPTOKURTIC)...
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