condition mean min max ZT0-3 88.459163 88.459163 88.459163 ZT4-7 61.16613649999999 61.16613649999999 61.16613649999999 ZT8-11 62.8018185 62.8018185 62.8018185 ZT12-15 113.85557750000001 113.85557750000001 113.85557750000001 ZT16-19 111.8960635 111.8960635 111.8960635 ZT20-23 85.58455699999999 85.58455699999999 85.58455699999999