In the present study, 19%, 23%, and 58% of the stations showed leptokurtic (excessively peaked), mesokurtic
(natural sediment average), and platykurtic (deficiently peaked) curve, respectively.
The skewness is very fine to fine, and the sands are very leptokurtic to mesokurtic
. The carbonate content in the dune sands ranges from 1.5%-to 5%.
Specifically, with total sample sizes of 45 or larger, the LMM with the KR procedure is a suitable option for analyzing data when the distributions are: (a) mesokurtic
and not highly or extremely skewed; and (b) symmetric, with different degrees of kurtosis.
* If [R.sub.kur] = 3: mesokurtic
distribution(normally distributed surface)
From these plots, (l) the skewness is positive when [alpha] < 3.535 and negative when [alpha] > 3.535 and the kurtosis is (i) equal to 3 when either [alpha] = 2.4977 or [alpha] = 4.9151 which means that the distribution is mesokurtic
; (ii) greater than 3 when either [alpha] < 2.4977 or [alpha] > 4.9151 which means that the distribution is leptokurtic; (iii) smaller than 3 when 2.4977 < [alpha] < 4.9151 which means that the distribution is platykurtic.
The kurtosis values showed a range from 0.89-2.55 indicating that these sediments are very platykurtic to mesokurtic
to leptokurtic to very leptokurtic.
In both cases, a 0 would indicate a perfectly symmetrical and mesokurtic
distribution (for all the simulations h was fixed to 0).