condition mean min max ZT0-3 1026.5 1026.5 1026.5 ZT4-7 1192.8 1192.8 1192.8 ZT8-11 1158.6 1158.6 1158.6 ZT12-15 1269.9 1269.9 1269.9 ZT16-19 1203.9499999999998 1203.9499999999998 1203.9499999999998 ZT20-23 1119.0500000000002 1119.0500000000002 1119.0500000000002