condition mean min max ZT0-3 111.878519 111.878519 111.878519 ZT4-7 112.7602105 112.7602105 112.7602105 ZT8-11 139.4527515 139.4527515 139.4527515 ZT12-15 144.2382475 144.2382475 144.2382475 ZT16-19 152.4710315 152.4710315 152.4710315 ZT20-23 131.120309 131.120309 131.120309