condition mean min max ZT0-3 84.36195 51.7923 102.0055 ZT4-7 39.97905 39.97905 39.97905 ZT8-11 32.415949999999995 32.415949999999995 32.415949999999995 ZT12-15 54.953125 49.158950000000004 60.747299999999996 ZT16-19 63.83185 63.83185 63.83185 ZT20-23 94.91105 94.91105 94.91105