condition mean min max ZT0-3 1.63253 1.363175 1.9934349999999998 ZT4-7 3.220585 3.220585 3.220585 ZT8-11 11.94455 11.94455 11.94455 ZT12-15 6.613370000000001 4.901355000000001 8.325385 ZT16-19 3.156245 3.156245 3.156245 ZT20-23 1.781275 1.781275 1.781275