condition mean min max ZT0-3 1047.1 1047.1 1047.1 ZT4-7 708.4 708.4 708.4 ZT8-11 803.75 803.75 803.75 ZT12-15 832.6500000000001 832.6500000000001 832.6500000000001 ZT16-19 960.4000000000001 960.4000000000001 960.4000000000001 ZT20-23 1129.55 1129.55 1129.55