condition mean min max ZT0-3 6.626354999999999 6.626354999999999 6.626354999999999 ZT4-7 2.874245 2.874245 2.874245 ZT8-11 32.74038 32.74038 32.74038 ZT12-15 152.7831 152.7831 152.7831 ZT16-19 283.53 283.53 283.53 ZT20-23 87.05481 87.05481 87.05481