condition mean min max ZT0-3 92.770558 92.770558 92.770558 ZT4-7 40.6680165 40.6680165 40.6680165 ZT8-11 38.418463 38.418463 38.418463 ZT12-15 48.701747999999995 48.701747999999995 48.701747999999995 ZT16-19 82.7382085 82.7382085 82.7382085 ZT20-23 75.18936049999999 75.18936049999999 75.18936049999999