$
M_0 &= x_"лев" + h_M_0 frac(f_M_0 - f_(M_0 - 1), (f_M_0 - f_(M_0 - 1)) + (f_M_0 - f_(M_0 + 1))) \
M_e &= x^"лев"_(M_e) + h_(M_e) frac(0.5n - f^"нак"_(M_e - 1), f_(M_e)) \
S^2 &= frac(1, n - 1) sum_(i = 1)^m (x_i^"сер" - overline(X))^2 dot f_i \
overline(X) &= 1/n sum_(i = 1)^m x_i^"сер" dot f_i \
mu_k^* &= 1/n sum (x_i - overline(X))^k \
k_"асс" &= frac(mu_3^*, sigma^3) eq 1/n sum (frac(x_i - overline(X), hat(sigma)))^3 
$