[methods] organise preamble of main doc

diff --git a/methods/statistics.pdf b/methods/statistics.pdf
index 991c4494fa9d2ab8f5fd0a7b74007e69b63034d4..7a81019f20b07eedb87072e084bf7bf8305bb088 100644 (file)
Binary files a/methods/statistics.pdf and b/methods/statistics.pdf differ