condition mean min max ZT0-3 0.22828900000000002 0.22828900000000002 0.22828900000000002 ZT4-7 0.2945645 0.2945645 0.2945645 ZT8-11 0.3456205 0.3456205 0.3456205 ZT12-15 0.2623715 0.2623715 0.2623715 ZT16-19 0.435431 0.435431 0.435431 ZT20-23 0.29481999999999997 0.29481999999999997 0.29481999999999997