condition mean min max ZT0-3 10.574200000000001 10.574200000000001 10.574200000000001 ZT4-7 8.767 8.767 8.767 ZT8-11 8.085085 8.085085 8.085085 ZT12-15 11.18945 11.18945 11.18945 ZT16-19 12.6402 12.6402 12.6402 ZT20-23 11.9197 11.9197 11.9197