condition mean min max ZT0-3 436.824467 436.824467 436.824467 ZT4-7 265.914121 265.914121 265.914121 ZT8-11 115.42219349999999 115.42219349999999 115.42219349999999 ZT12-15 212.813944 212.813944 212.813944 ZT16-19 476.089425 476.089425 476.089425 ZT20-23 626.0535305000001 626.0535305000001 626.0535305000001