condition mean min max ZT0-3 24.135377 24.135377 24.135377 ZT4-7 29.485114 29.485114 29.485114 ZT8-11 36.915413 36.915413 36.915413 ZT12-15 64.36102650000001 64.36102650000001 64.36102650000001 ZT16-19 29.864609 29.864609 29.864609 ZT20-23 30.5821075 30.5821075 30.5821075