condition mean min max ZT0-3 44.47045 36.083 51.69055 ZT4-7 39.7663 39.7663 39.7663 ZT8-11 19.0673 19.0673 19.0673 ZT12-15 21.855275 14.123750000000001 29.5868 ZT16-19 15.0592 15.0592 15.0592 ZT20-23 29.9699 29.9699 29.9699