Dear authors,

Further to the comments of the reviewers and your response I am happy to recommend publication of your article subject to minor revisions. I therefore invite you to submit the revised version, and I will give it a last read before sending it for copy-editing. In submitting this revised version, please consider the following editorial considerations:

- consider alternatives to the phrase "it has to be noted that..." (pp. 5 and 6.). These phrases tend to be useless.
- 90 % significance is bad practice (cf. classical textbooks on statistical modelling like Davison's Statistical Models). The 'significance level' is in fact the p-value, i.e., 0.1. not 90 %. Make sure the null-hypothesis is clearly stated. It is as much important as the type of test considered (t-test in this case)
- The symbol "~" often means 'similar to', 'proportional to' or 'scaling as'. Use "\approx" (or spell it in plain: "approx.")

Yours sincerely,

Michel Crucifix.

Congratulations !