condition mean min max ZT0-3 11.309123 11.309123 11.309123 ZT4-7 11.580161 11.580161 11.580161 ZT8-11 12.011167 12.011167 12.011167 ZT12-15 10.023641999999999 10.023641999999999 10.023641999999999 ZT16-19 11.514783 11.514783 11.514783 ZT20-23 11.45665 11.45665 11.45665