condition mean min max ZT0-3 5348.450000000001 5348.450000000001 5348.450000000001 ZT4-7 295.7 295.7 295.7 ZT8-11 443.54999999999995 443.54999999999995 443.54999999999995 ZT12-15 686.25 686.25 686.25 ZT16-19 1086.65 1086.65 1086.65 ZT20-23 3454.95 3454.95 3454.95