condition mean min max ZT0-3 10.71865 9.9351 11.5022 ZT4-7 4.755835 4.755835 4.755835 ZT8-11 5.233 5.233 5.233 ZT12-15 0 0 0 ZT16-19 11.5996 11.5996 11.5996 ZT20-23 8.148955 8.148955 8.148955