Within each experiment, the arithmetic means were calculated weighing the errors.
The periodontal index reflects the within-mouth arithmetic average of scores for all teeth (periodontal index range is continuous from 0 to 8.0).
Within the elementary arithmetic, there are two representative formats corresponding to EX and AP calculations: a language-specific format and a language-independent format.
MIC50 and NOEC values were aggregated within cogeneric species by using the arithmetic mean to minimize the lack of independence between individual observations [see Supplemental Material, Section 1 and Figure S1 (http://dx.doi.org/10.1289/ehp.1104650)].
The precision (defined as the relative standard deviation σ/A, where σ is the standard deviation and A is the arithmetic mean) was within 1% for SiO2 and within 2% for Na2O and CaO, at about 3 4% for MgO, K2O and Al2O3 and typically within 10% for TiO2, MnO and Fe2O3.
To reduce analytical complexity, for each gene on the array we analyzed the arithmetic mean of replicated spots within arrays.
Fold changes were based on the arithmetic mean of exposed versus control within groups.
We estimated daily community-level pollutant exposure as the arithmetic mean of daily monitor observations within the community.
In these cases, the arithmetic mean method and geometric method errors were reported within 4%and1.5%5%, respectively.
The arithmetic is simple.
