The phrase 'variance of groups' is correct and can be used in written English.
You can use it to refer to the differences or variations between groups, such as when discussing the potential outcomes of different methods of teaching. For example: "The variance of groups in the study highlights that different methods of teaching can result in varying outcomes."
Statistical evaluation of headache frequency was based on time series analysis of variance of groups, i.e. preventively treated patients and non-treated patients.
The total order Sobol index describes the influence of the parameter itself plus all its combination with the other eight (total order SI is the sum of all SI of the variable, including higher order indices that express the variance of groups of variables).
The variance of groups was tested for equality by an F-test prior to a t-test analysis.
Since the variance of groups 1 4 appeared to be not strictly homogeneous, medians were calculated and the significance of differences tested according to Kruskal Wallis to confirm results obtained by the ANOVA.
It is a method that is probably more useful for testing differences in the mean and variances of groups along specific, constrained axes of morphospace.
The differences between the variances of groups were corrected following Levene's test for equality of variances.
Levene's variance homogeneity analysis showed that the variances of groups were homogenous in serum Hcy, vitamin B12, folic acid, age and gender (P > 0.05).
Comparisons between data of two independent groups were analyzed by unpaired Student's t test and the differences between the variances of groups were corrected following Levene's test for equality of variances.
E.g., when variances of groups of informants are equal, raw difference scores and standardized difference scores will bring forth the same results when examining informant discrepancies with other variables.
For each linear mixed-effects model assumptions – constant variance, homogeneity of group variances and normality of the within-group errors – were assessed graphically (Pinheiro and Bates, 2000).
The ADHD Combined group had the lowest explained variance of all groups on the spatial measures.
