condition mean min max ZT0-3 91.307341 91.307341 91.307341 ZT4-7 77.952257 77.952257 77.952257 ZT8-11 75.2392805 75.2392805 75.2392805 ZT12-15 89.3746895 89.3746895 89.3746895 ZT16-19 121.144594 121.144594 121.144594 ZT20-23 71.92816099999999 71.92816099999999 71.92816099999999