condition mean min max ZT0-3 2.10226 2.10226 2.10226 ZT4-7 1.765185 1.765185 1.765185 ZT8-11 0.4535095 0.4535095 0.4535095 ZT12-15 2.32434 2.32434 2.32434 ZT16-19 1.104663 1.104663 1.104663 ZT20-23 3.965895 3.965895 3.965895