Sign test for differences between paired values. This is a very robust
but very low power test. Alternatives are Alt.less, meaning elements
of before are typically less than corresponding elements of after,
Alt.greater, meaning elements of before are typically greater than
elements of after, and Alt.twoSided, meaning that there is a significant
difference in either direction.
A TestRes with the proportion of elements of before that were
greater than the corresponding element of after, and the P-value against
the given alternative.
Sign test for differences between paired values. This is a very robust but very low power test. Alternatives are Alt.less, meaning elements of before are typically less than corresponding elements of after, Alt.greater, meaning elements of before are typically greater than elements of after, and Alt.twoSided, meaning that there is a significant difference in either direction.