condition mean min max ZT0-3 0.566184 0.566184 0.566184 ZT4-7 0.45969649999999995 0.45969649999999995 0.45969649999999995 ZT8-11 0.826677 0.826677 0.826677 ZT12-15 0.6339035 0.6339035 0.6339035 ZT16-19 0.6909983333333333 0.6909983333333333 0.6909983333333333 ZT20-23 0.7281037699999999 0.7281037699999999 0.7281037699999999