condition mean min max ZT0-3 11.9337 11.9337 11.9337 ZT4-7 12.754000000000001 12.754000000000001 12.754000000000001 ZT8-11 5.66458 5.66458 5.66458 ZT12-15 4.796685 4.796685 4.796685 ZT16-19 8.840545 8.840545 8.840545 ZT20-23 10.95165 10.95165 10.95165