Statistics

It means that it is not significant. If a result is not significant any faint hint of a correlation the writer was hoping to see is nothing but wishful thinking.

From the wikipedia page on statistical significance
:In statistical hypothesis testing, a result has statistical significance when it is very unlikely to have occurred given the null hypothesis.

Let the variable probablySo be the chance of a study correctly rejecting a null hypothesis, and the variable justChance be the probability of getting a result at least as extreme just through random happenstance.

Statistically significant is where justChance < probablySo