condition mean min max ZT0-3 0.62773375 0.44145749999999995 0.81401 ZT4-7 1.5264855 1.5264855 1.5264855 ZT8-11 0.821307 0.821307 0.821307 ZT12-15 0 0 0 ZT16-19 0.3106775 0.3106775 0.3106775 ZT20-23 0.4349715 0.4349715 0.4349715