condition mean min max ZT0-3 120.416687 120.416687 120.416687 ZT4-7 108.998346 108.998346 108.998346 ZT8-11 107.4991525 107.4991525 107.4991525 ZT12-15 86.4277685 86.4277685 86.4277685 ZT16-19 122.878848 122.878848 122.878848 ZT20-23 158.3233995 158.3233995 158.3233995