condition mean min max ZT0-3 95.775925 95.775925 95.775925 ZT4-7 95.84870000000001 95.84870000000001 95.84870000000001 ZT8-11 87.9536 87.9536 87.9536 ZT12-15 91.90084166666666 91.90084166666666 91.90084166666666 ZT16-19 93.616725 93.616725 93.616725 ZT20-23 89.4004 89.4004 89.4004