I am reviewing a paper where I found this sentence repeatedly:
A is statistically insignificantly worse than B
I consider this to be confusing since, for me at least, it is not immediately clear if it is the same as:
A is not statistically significantly worse than B
Maybe the authors are trying to convey the fact that the data for A are worse, but that this is not statistically significant. If this is the case though, it is not clear whether they mean that the sample average is worse or sample median is worse or something else.
Should I recommend that they reformulate this sentence or is it common practice to say "statistically insignificantly worse"?