condition mean min max ZT0-3 70.6514 70.6514 70.6514 ZT4-7 82.83905 82.83905 82.83905 ZT8-11 66.34455 66.34455 66.34455 ZT12-15 62.3869 62.3869 62.3869 ZT16-19 44.83245 44.83245 44.83245 ZT20-23 57.841750000000005 57.841750000000005 57.841750000000005