The phrase "a source of variance" is correct and usable in written English.
It can be used in contexts related to statistics, research, or analysis where you are discussing factors that contribute to differences or variability in data or outcomes.
Example: "In our study, we identified temperature as a significant source of variance in the growth rates of the plants."
Alternatives: "a factor of variation" or "a contributor to variability".
This method did not account for age as a source of variance, so we used analysis of variance (ANOVA) as the primary method to rank genes according to the likelihood that there is a sex difference in expression after accounting for overall age effects (which have been reported previously).
Each subsampling step is a source of variance in the final OTA test result.
A further limitation of the present study is that the healthy reference samples [ 29, 30] were not identical and this may be a source of variance.
The results could also be compared with those from the Dell OptiPlex 760 running Windows XP, in Table 1, since both used the same monitor, removing a source of variance.
In both of the above instances PC2 explains a source of variance in gene expression between the SC (more negative PC2) and YF (more positive PC2) transcriptomes that is not influenced by YC transcriptomes.
These results show that when a source of variance due to the differences between measurement methods employed in the different studies is eliminated, there is a consistent reduction of the effect size (which is still demonstrative of a statistically significant difference between groups) accompanied by a reduction to almost half of the heterogeneity.
'Setup' was a significant source of variance [according to LSD post hoc analysis after one-way ANOVA: F = 3.253, df = 41, P<0.049, (C. ruficornis) and F = 3.039, df = 41, P<0.059, (G. guerreroensis)].
The application of multiple correction methods represents a critical source of variance in previous studies.
Data acquisition at different time points is considered as a main source of variance in many GC-MS studies.
Prior to examining inter- and intra-probe variance, it was important to first examine the overall array quality as a possible source of variance within our studies.
A unique source of variance (eit) was included which was assumed to systematically increase or decrease throughout the scale, reflecting changed reliability.
