condition mean min max ZT0-3 58.0206 48.25535 66.6009 ZT4-7 29.19525 29.19525 29.19525 ZT8-11 17.3627 17.3627 17.3627 ZT12-15 34.293175 24.862499999999997 43.72385 ZT16-19 26.4158 26.4158 26.4158 ZT20-23 39.4207 39.4207 39.4207