FuzzyNumber             A fuzzy number given by its alpha-level cuts
FuzzyRandom             Statistics of Fuzzy Random Variables: a
                        Puri-Ralescu Framework
FuzzySample             Build a sample of fuzzy random variables
alpha_levels            Alpha grid of a fuzzy object
as_fuzzy_sample         Coerce to a FuzzySample
clt                     Central limit theorem for a fuzzy random sample
correlation             Correlation of two fuzzy random variables
                        (sample)
covariance              Covariance of two fuzzy random variables
                        (sample)
cut_at                  Cut of a fuzzy number at a single level
cuts                    Alpha-level cuts of a fuzzy number
expectation             Expectation of a fuzzy random variable (sample)
fuzzy_ecdf              Empirical distribution function of a fuzzy
                        random sample
fuzzy_from_membership   A fuzzy number from a membership function
                        evaluated on a grid
fuzzy_normal            Construct a fuzzy normal distribution
is_fuzzy_number         Whether an object is a (valid) fuzzy number
is_fuzzy_sample         Whether an object is a FuzzySample
ks_test                 One- and two-sample fuzzy Kolmogorov-Smirnov
                        tests
lln                     Level-wise sample-mean convergence (LLN)
n_cuts                  Number of alpha levels of a fuzzy object
n_obs                   Number of observations in a sample
rnorm_fuzzy             Sample fuzzy random variables from a fuzzy
                        normal distribution
spectral_covariance     Scalar covariance (Feng-Hu-Shu integral)
spectral_variance       Scalar variance (Feng-Hu-Shu integral)
trapezoidal_fuzzy       Trapezoidal fuzzy number
triangular_fuzzy        Triangular fuzzy number
variance                Variance of a fuzzy random variable (sample)
