A definition of kurtosis is given in statfns.ijs :
NB. kurtosis = 4th moment coefficient
kurtosis=: # * +/@(^&4)@dev % *:@ssdev
There seems to be a different definition of kurtosis given in the
Electronic Textbook from Statsoft:
http://www.statsoft.com/textbook/stathome.html
or more precisely at the bottom of page:
http://www.statsoft.com/textbook/glosi.html
Can anyone confirm and explain the difference?
Thanks,
Tarmo
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