condition mean min max ZT0-3 49.1318 39.632149999999996 58.63145 ZT4-7 69.68295 69.68295 69.68295 ZT8-11 72.40039999999999 72.40039999999999 72.40039999999999 ZT12-15 0 0 0 ZT16-19 63.00085 63.00085 63.00085 ZT20-23 56.51925 56.51925 56.51925