condition mean min max ZT0-3 10.498339 10.498339 10.498339 ZT4-7 11.078172 11.078172 11.078172 ZT8-11 10.05045 10.05045 10.05045 ZT12-15 11.109207999999999 11.109207999999999 11.109207999999999 ZT16-19 9.853359000000001 9.853359000000001 9.853359000000001 ZT20-23 10.255365000000001 10.255365000000001 10.255365000000001