condition mean min max ZT0-3 429.616672 429.616672 429.616672 ZT4-7 441.364436 441.364436 441.364436 ZT8-11 523.366205 523.366205 523.366205 ZT12-15 520.6610909999999 520.6610909999999 520.6610909999999 ZT16-19 616.239697 616.239697 616.239697 ZT20-23 574.2048295 574.2048295 574.2048295