@rnd_normal(μ:float, σ:float)

returns a random generator that produces floating-point values according to a normal distribution P:

    P(x | μ, σ) = 1/(σ \sqrt{2 π})  e^{- (x - μ)^2/(2 σ^2)}

See @rnd_bernoulli for a description of random generators.

See also Random Related Functions @rand,    @rand_int,    @random,    @rnd_bernoulli,    @rnd_binomial,    @rnd_exponential,    @rnd_gamma,    @rnd_geometric,    @rnd_normal,    @rnd_uniform_float,    @rnd_uniform_int