condition mean min max ZT0-3 75.88713333333334 66.7641 93.4399 ZT4-7 87.15995000000001 87.15995000000001 87.15995000000001 ZT8-11 78.20915 78.20915 78.20915 ZT12-15 65.147075 59.42425 70.8699 ZT16-19 54.79475 54.79475 54.79475 ZT20-23 64.31575000000001 64.31575000000001 64.31575000000001