AMLN—[Feuerstein] must not have read your reply to my posting. LOL.
Evidently not :- )
Although he could still be correct if the entire confidence interval were on the wrong side of 0.
That seems intuitively unlikely given the small difference in the means. For someone with your expertise in statistics, it ought to be easy to get a rough idea.
“The efficient-market hypothesis may be the foremost piece of B.S. ever promulgated in any area of human knowledge!”