condition mean min max ZT0-3 65.34575000000001 61.5792 69.1123 ZT4-7 33.3689 33.3689 33.3689 ZT8-11 70.883 70.883 70.883 ZT12-15 0 0 0 ZT16-19 98.46755 98.46755 98.46755 ZT20-23 88.61695 88.61695 88.61695