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"""Statistical functions and distributions.
Provides statistical distributions, hypothesis tests, and descriptive
statistics backed by the SciRS2 Rust implementation. The API mirrors
``scipy.stats`` for easy migration.
Classes
-------
Normal : Normal (Gaussian) distribution
Beta : Beta distribution
Gamma : Gamma distribution
Binomial : Binomial distribution
Poisson : Poisson distribution
Functions
---------
mean : Arithmetic mean
std : Standard deviation
var : Variance
median : Median
ttest_1samp : One-sample t-test
ttest_ind : Independent two-sample t-test
ttest_rel : Paired t-test
chi2_test : Chi-squared test
ks_test : Kolmogorov-Smirnov test
pearsonr : Pearson correlation coefficient
spearmanr : Spearman rank correlation
"""
=