The phrase "adding to the variation" is correct and usable in written English.
It can be used when discussing how something contributes to diversity or differences within a particular context.
Example: "The new design elements are adding to the variation in our product line, making it more appealing to a wider audience."
Alternatives: "contributing to the diversity" or "enhancing the variety".
There their impact on the nature and development of savanna vegetation was superimposed on the natural pattern, adding to the variation seen among savanna types.
Seizures can come in clusters, thereby adding to the variation in seizure frequency.
Lifestyle factors such as diet and smoking are well-established factors adding to the variation seen in ageing.
Chickens from more than one parent flock may be mixed in the same broiler house, adding to the variation in the level of MDA.
For instance, in the time interval 1980 1990, a variation of about −4 nT/year would be added to the variation of the internal field, significantly altering the values and the pattern of the corresponding secular variation map, as Fig. 11 shows.
These would probably add to the variation rather than reduce it.
Almost all children had lost a family member, hence the first event did not add to the variation in the count.
However, ancient alpha 1 domain lineages shared between divergent species are shuffled between alleles through recombination and thus also add to the variation [ 13, 14, 16].
Thus, the variation in MeHg exposure from fish adds to the variation in RBC-IHg, which can partly explain the larger inter-individual variation measured in the distribution of IHg between RBC and plasma.
Variation between females in circulating hormone levels at the time of testing, independent of lavage readings, could add to the variation seen in motivation, which could obscure differences that would otherwise be identified during post hoc analysis.
Despite the high identity throughout the coding regions, the spots on the array do not contain any intronic sequences, which might influence the hybridization signal and add to the variation.
