condition mean min max ZT0-3 5.85122 5.85122 5.85122 ZT4-7 2.99986 2.99986 2.99986 ZT8-11 8.15133 8.15133 8.15133 ZT12-15 12.882249999999999 12.882249999999999 12.882249999999999 ZT16-19 13.4832 13.4832 13.4832 ZT20-23 10.343565 10.343565 10.343565