condition mean min max ZT0-3 14.203050000000001 14.203050000000001 14.203050000000001 ZT4-7 10.202275 10.202275 10.202275 ZT8-11 10.187435 10.187435 10.187435 ZT12-15 15.45415 15.45415 15.45415 ZT16-19 16.76355 16.76355 16.76355 ZT20-23 16.25525 16.25525 16.25525