condition mean min max ZT0-3 54.7209 54.7209 54.7209 ZT4-7 51.48235 51.48235 51.48235 ZT8-11 51.5201 51.5201 51.5201 ZT12-15 48.22775 48.22775 48.22775 ZT16-19 71.26644999999999 71.26644999999999 71.26644999999999 ZT20-23 58.412800000000004 58.412800000000004 58.412800000000004