condition mean min max ZT0-3 32.6226 31.28155 33.96365 ZT4-7 36.3527 36.3527 36.3527 ZT8-11 30.447850000000003 30.447850000000003 30.447850000000003 ZT12-15 0 0 0 ZT16-19 43.64255 43.64255 43.64255 ZT20-23 33.0439 33.0439 33.0439