condition mean min max ZT0-3 4.98324 4.98324 4.98324 ZT4-7 4.979464999999999 4.979464999999999 4.979464999999999 ZT8-11 5.63991 5.63991 5.63991 ZT12-15 4.819455 4.819455 4.819455 ZT16-19 6.60129 6.60129 6.60129 ZT20-23 5.40907 5.40907 5.40907