condition mean min max ZT0-3 9.172227500000002 7.268510000000001 11.075945 ZT4-7 9.1318 9.1318 9.1318 ZT8-11 4.8500499999999995 4.8500499999999995 4.8500499999999995 ZT12-15 0 0 0 ZT16-19 8.623545 8.623545 8.623545 ZT20-23 4.330175 4.330175 4.330175