condition mean min max ZT0-3 8.0141925 5.768465 10.259920000000001 ZT4-7 16.38165 16.38165 16.38165 ZT8-11 10.33775 10.33775 10.33775 ZT12-15 0 0 0 ZT16-19 8.52664 8.52664 8.52664 ZT20-23 13.7028 13.7028 13.7028