condition mean min max ZT0-3 15.26725 13.8826 17.2135 ZT4-7 11.7071 11.7071 11.7071 ZT8-11 14.4841 14.4841 14.4841 ZT12-15 18.5108 18.113799999999998 18.9078 ZT16-19 18.26105 18.26105 18.26105 ZT20-23 18.512300000000003 18.512300000000003 18.512300000000003