condition mean min max ZT0-3 182.57575 154.103 211.0485 ZT4-7 87.2868 87.2868 87.2868 ZT8-11 27.41245 27.41245 27.41245 ZT12-15 0 0 0 ZT16-19 125.276 125.276 125.276 ZT20-23 143.252 143.252 143.252