The phrase "a statistically significant fraction" is correct and usable in written English.
It can be used in contexts involving statistical analysis, research findings, or data interpretation to indicate that a portion of the data is statistically significant.
Example: "In our study, we found that a statistically significant fraction of participants reported improved symptoms after the treatment."
Alternatives: "a meaningful portion" or "a significant percentage".
A statistically significant fraction of these variable genes was found on the pSymA megaplasmid and grouped in clusters.
Signal B outperforms the other two in 37 out of a total of 51 cases, which is a statistically significant fraction (p = 1.2 × 10−8 by ratio test, under the null hypothesis of no difference between the methods).
Given that we found that a statistically significant fraction of the ribosome biogenesis genes are located on the genome as adjacent gene pairs, we sought to determine whether this non-random pattern of gene location was common to other sets of related genes.
Our main finding was that physical activity accounted for a small but statistically significant fraction (5% or less) of PGWB scores in all subdimensions, with anxiety and self-control as conspicuous exceptions.
Starting on day 14 of the experiment leptin KO CR group showed a statistically significant greater fraction of hanging behavior relative to the leptin KO AL control (Fig. 4D).
A statistically significant higher fraction of cells in S-phase and G2/M-phase was found at daytime as compared to midnight when excluding the four patients with an abnormal circadian variation in cortisol.
While the majority of genes are associated with 4 or fewer intergenic CSSs, as shown in Fig. 5, a statistically significant higher fraction of transcription factor-encoding genes are associated with greater than four intergenic CSSs compared to other genes (P < 10-7, CHI-Square test).
There was a statistically significant difference in fraction of outliers for FFC angle in favor of the SPPC group.
There was a statistically significant difference in fraction of outliers for both the LFC angle and the LTC angle, both in favor of the SPPC group.
Increasing temperature by 4 °C led to a statistically significant increase of the fraction of phytoplankton cells with at least one attached bacterium, comprising 29% of all autotrophs (Wilcoxon test, P<0.01; Figure 2a).
The average 3H4MV fraction of the parent strain was 0.29 mol% (number of repeated culture, n = 20) in this assay condition, whereas that of leucine analog resistant mutants showed 0.43 mol% (number of analyzed colonies, n = 440), which showed a statistically significant increase in 3H4MV fraction.
