condition mean min max ZT0-3 176.64288333333334 89.61564999999999 227.7175 ZT4-7 69.3149 69.3149 69.3149 ZT8-11 78.38714999999999 78.38714999999999 78.38714999999999 ZT12-15 122.29175000000001 112.27850000000001 132.305 ZT16-19 150.443 150.443 150.443 ZT20-23 230.757 230.757 230.757