condition mean min max ZT0-3 10.588865 10.588865 10.588865 ZT4-7 8.819145 8.819145 8.819145 ZT8-11 9.509955000000001 9.509955000000001 9.509955000000001 ZT12-15 6.32646 6.32646 6.32646 ZT16-19 10.18835 10.18835 10.18835 ZT20-23 10.6761 10.6761 10.6761