Table 4 Percentage level of accuracy as defined in terms of the standard error to mean ratio (E) and the ratio of the half-width of the confidence intervala to the mean (D) for stratified random sampling of Tylenchulus semipenetrans in citrus orchards of Egypt (Abd-Elgawad 2017)
Cost of samples (US $) | Finance-based number of samples | Mean nematode count per sampleb | Level of accuracy/reliabilityc | |
|---|---|---|---|---|
D | E | |||
Taylor’s power law parameters: a = 0.83, b = 1.95 in Egypt | ||||
100 | 10 | 800 | 55% | 24% |
150 | 15 | 100 | 45% | 21% |
150 | 15 | 1 | 50% | 24% |
200 | 20 | 1 | 43% | 20% |
250 | 25 | 1 | 38% | 18% |
750 | 150 | 1 | 15% | 7% |
200 | 20 | 2100 | 35% | 17% |
600 | 120 | 2100 | 14% | 7% |