condition mean min max ZT0-3 20.9996 20.4595 21.5397 ZT4-7 18.285899999999998 18.285899999999998 18.285899999999998 ZT8-11 10.262975 10.262975 10.262975 ZT12-15 0 0 0 ZT16-19 16.7194 16.7194 16.7194 ZT20-23 20.86125 20.86125 20.86125