condition mean min max ZT0-3 1010.9499999999999 1010.9499999999999 1010.9499999999999 ZT4-7 1095.9 1095.9 1095.9 ZT8-11 850.6 850.6 850.6 ZT12-15 891.45 891.45 891.45 ZT16-19 1047.0500000000002 1047.0500000000002 1047.0500000000002 ZT20-23 923.5 923.5 923.5