condition mean min max ZT0-3 0.6340705 0.6340705 0.6340705 ZT4-7 0.37136800000000003 0.37136800000000003 0.37136800000000003 ZT8-11 0.4076595 0.4076595 0.4076595 ZT12-15 0.49120199999999997 0.49120199999999997 0.49120199999999997 ZT16-19 0.5411485 0.5411485 0.5411485 ZT20-23 0.5510275 0.5510275 0.5510275