condition mean min max ZT0-3 4.9064225 4.903175 4.90967 ZT4-7 3.4335250000000004 3.4335250000000004 3.4335250000000004 ZT8-11 3.19505 3.19505 3.19505 ZT12-15 0 0 0 ZT16-19 3.942105 3.942105 3.942105 ZT20-23 5.141495 5.141495 5.141495