Figure 2 in Estimating optimal sample size for tardigrade morphometry

Figure 2. The relationship between estimation error and sample size has an asymptotic character both for means (A) and for ranges (B), meaning that the larger the sample size, the smaller the estimation error, but the reduction in error diminishes with the increasing sampling effort. Graphs show means ƚSD calculated from six species means (see Table 3). Dashed horizontal lines represent acceptable error rates: A, for means, errors under the dashed line are acceptable (i.e. sample sizes n ≥ 20; B, for ranges, errors above the dashed line are acceptable (i.e. none of the shown sample sizes returns an acceptable range estimation).