condition mean min max ZT0-3 5.36378 5.36378 5.36378 ZT4-7 4.352735 4.352735 4.352735 ZT8-11 3.471835 3.471835 3.471835 ZT12-15 6.867509999999999 6.867509999999999 6.867509999999999 ZT16-19 7.921685 7.921685 7.921685 ZT20-23 9.4311 9.4311 9.4311