Sign test

SignTest(x::AbstractVector{T<:Real}, median::Real=0)
Perform a sign test of the null hypothesis that the distribution from which x was drawn has median median against the alternative hypothesis that the median is not equal to median.

Implements: pvalue, confint

SignTest(x::AbstractVector{T<:Real}, y::AbstractVector{T<:Real}, median::Real=0)
Perform a sign test of the null hypothesis that the distribution of x - y has median median against the alternative hypothesis that the median is not equal to median.

Implements: pvalue, confint