condition mean min max ZT0-3 115.27633333333333 109.451 119.8545 ZT4-7 95.08215 95.08215 95.08215 ZT8-11 78.68635 78.68635 78.68635 ZT12-15 84.515675 76.60695 92.4244 ZT16-19 94.326 94.326 94.326 ZT20-23 105.6935 105.6935 105.6935