condition mean min max ZT0-3 25.91 25.91 25.91 ZT4-7 25.1261 25.1261 25.1261 ZT8-11 24.953400000000002 24.953400000000002 24.953400000000002 ZT12-15 17.987099999999998 17.987099999999998 17.987099999999998 ZT16-19 15.8556 15.8556 15.8556 ZT20-23 13.551766666666666 13.551766666666666 13.551766666666666