Al-Kashi: Compute statistics on a set of values

This class can compute statistics on a set of values.

It takes an array of values and can computes the mean, median, mode, variance, standard deviation, coefficient of variation, skewness, and Kurtosis, covariance, correlation, and regression analysis, paired and unpaired t-Test including calculate the probability of null hypothesis, normal distribution, student t-distribution one and two tailed, F distribution, chi-square test or contingency tables (A/B testing), analysis of variance (ANOVA), Shannon and Simpson diversity index, moving average, hierarchical and k-mean clustering, boxplot, histogram, normal Q-Q plot, ternary plot, "1224" ranking, standardize.