condition mean min max ZT0-3 1.6170595 0.1527085 2.74758 ZT4-7 1.145385 1.145385 1.145385 ZT8-11 0.2218545 0.2218545 0.2218545 ZT12-15 0.89418625 0.45287350000000004 1.335499 ZT16-19 1.832825 1.832825 1.832825 ZT20-23 2.05884 2.05884 2.05884