condition mean min max ZT0-3 575.520894 575.520894 575.520894 ZT4-7 371.5864345 371.5864345 371.5864345 ZT8-11 390.86404949999996 390.86404949999996 390.86404949999996 ZT12-15 524.5807765 524.5807765 524.5807765 ZT16-19 585.718877 585.718877 585.718877 ZT20-23 527.523636 527.523636 527.523636