condition mean min max ZT0-3 16.19065 14.2156 18.1657 ZT4-7 10.469005 10.469005 10.469005 ZT8-11 8.4574 8.4574 8.4574 ZT12-15 0 0 0 ZT16-19 9.788920000000001 9.788920000000001 9.788920000000001 ZT20-23 11.49025 11.49025 11.49025