condition mean min max ZT0-3 109.28965 102.41579999999999 116.1635 ZT4-7 91.9365 91.9365 91.9365 ZT8-11 204.2215 204.2215 204.2215 ZT12-15 0 0 0 ZT16-19 234.317 234.317 234.317 ZT20-23 156.1275 156.1275 156.1275