Open Access

Table 3

Central tendency, dispersion and measure of variations.

  Description Ceramic liner hole diameter Ceramic liner inter-hole spacing
1 Number of observations (n) 51 66
2 Minimum value 18.4 15
3 Maximum value 22.4 39
4 Median 20.8 29
5 Mean 20.8 27.5
6 Mode 21.1 27
7 Standard deviation (SD) 0.66 1.06
8 Coefficient of variation (CV) 3.17% 3.85%
9 Standard error (SE) 0.09 0.13

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