The frequency distribution type for each monthly Kc database was determined based upon their respective skewness and kurtosis values. It was observed that January, February, March and December are classified as Type IV distribution, whereas the remaining months are classified as Type V distributions, the most preferred distribution types with regard to solar energy conversion systems. The frequency distribution data for January (type IV) and July (type V) are shown in Figs. 4.7 and 4.8, respectively.
Fig. 4.7 Frequency distribution of Kc for January – type IV