condition mean min max ZT0-3 18.392400000000002 18.392400000000002 18.392400000000002 ZT4-7 10.338655000000001 10.338655000000001 10.338655000000001 ZT8-11 19.8189 19.8189 19.8189 ZT12-15 19.9747 19.9747 19.9747 ZT16-19 39.89275 39.89275 39.89275 ZT20-23 20.15735 20.15735 20.15735