condition mean min max ZT0-3 81.540248 81.540248 81.540248 ZT4-7 96.320033 96.320033 96.320033 ZT8-11 104.13906800000001 104.13906800000001 104.13906800000001 ZT12-15 91.5968365 91.5968365 91.5968365 ZT16-19 95.51441349999999 95.51441349999999 95.51441349999999 ZT20-23 80.3489645 80.3489645 80.3489645