Such dispersion might be derived from cultural differences and different sample size.
The aim of this study was to discuss and compare different sample size formulae for the risk difference.
12 Lack of consistency between studies might therefore be explained by a different sample size and power, by geographical differences in allele frequencies and association patterns or by different study designs or definitions of HLA genotypes (two vs four-digit typing, different classifications for the SE).
In this case the empirical frequency distributions taken at random from the same population, but forming different sample size statistics become significantly different when difference between given sample sizes increases.
Indeed the effect size might differ from study to study as a consequence of the different sample size, geometric features of the roundabout, the context of insertion, the driver population characteristics, and so on.
The absence of a detectable difference suggests equivalence, but proof of equivalence would require a different sample size.
Therefore, we assumed that different sample size or N e do not bias our design although great differences between compared breeds might not be advantageous.
Fig. 7 The statistical characteristics of the estimated average landslide volume (V a) regarding different sample size are presented.
Fig. 3 The statistical characteristics of the estimated power exponents and rollovers (R) regarding different sample size are presented.
In particular, different sample size determinations were carried out for different fertilization levels, varieties (Indica and Japonica type), development stages, sowing techniques and typologies of the sampling unit.
b Error between the empirical HTR and approximations of HTR for different sample size 10,000≤N≤100,000 and α=1.25 (impulsive).
