condition mean min max ZT0-3 13.78555 13.78555 13.78555 ZT4-7 15.527149999999999 15.527149999999999 15.527149999999999 ZT8-11 12.521799999999999 12.521799999999999 12.521799999999999 ZT12-15 10.844750000000001 10.844750000000001 10.844750000000001 ZT16-19 12.5171 12.5171 12.5171 ZT20-23 11.5857 11.5857 11.5857