The phrase "a big variance" is correct and usable in written English.
It can be used when discussing significant differences or deviations in data, results, or measurements.
Example: "The study revealed a big variance in the test scores among different demographic groups."
Alternatives: "a large discrepancy" or "a significant difference".
Additionally, we find a big variance in the physical-technical prior competencies.
I then compared sector weightings where you'd expect a big variance from Russell Growth.
Summing up, the results of our survey reveal a big variance in the physical-technical prior competencies.
Rental marketplaces are typically demand-pick, which means they have a big variance in fill rates (the number of requests from users that are actually fulfilled by the marketplace).
For the small values of period, we have a big variance between the neighboring values, but for the big values of the periods, the deviation is less than the one for the small values.
Although median plaque growth rates were similar in both mouse models, individual plaque growth rates showed a big variance.
This will introduce some unnecessary distortion since the distribution of the prediction errors estimated from the marked pixels has a bigger variance than that estimated from the original pixels.
First of all, the total number of incident cases was small, resulting in a bigger variance of the outcome estimate.
For very small shifts and very big shifts no big difference was found between the pooling strategy and the combination test, even in the presence of a bigger variance in the second phase.
Since the early 1980s, deficits have averaged around -3% of GDP with a pretty big variance, -5% in the mid-80s, +2.4% (surplus) in 2000, as high as -10% during the great recession, and about -7% and falling now.
This means that in addition to small sample size of included primary studies, those studies reporting very high accuracy will also have a relatively big variance and thus be weighted less.
