@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 Generators @rand    @rand_int    @random    @rnd_bernoulli    @rnd_binomial    @rnd_exponential    @rnd_gamma    @rnd_geometric    @rnd_normal    @rnd_uniform_float    @rnd_uniform_int