condition mean min max ZT0-3 82.92555 82.92555 82.92555 ZT4-7 60.16074999999999 60.16074999999999 60.16074999999999 ZT8-11 49.86465 49.86465 49.86465 ZT12-15 55.0189 55.0189 55.0189 ZT16-19 63.1484 63.1484 63.1484 ZT20-23 72.74685 72.74685 72.74685