condition mean min max ZT0-3 7.88057 7.395925 8.365215 ZT4-7 5.645065000000001 5.645065000000001 5.645065000000001 ZT8-11 9.242370000000001 9.242370000000001 9.242370000000001 ZT12-15 0 0 0 ZT16-19 10.22352 10.22352 10.22352 ZT20-23 9.269945 9.269945 9.269945