[chem] write prac intro & format results

diff --git a/spec/statistics.pdf b/spec/statistics.pdf
index adbdbf0fcde37250c2e34e004555a3515fbe7bdd..9a63860bef32597f9e026bdcc95c2915da78773d 100644 (file)
Binary files a/spec/statistics.pdf and b/spec/statistics.pdf differ