condition mean min max ZT0-3 0.185465 0.185465 0.185465 ZT4-7 0.55546 0.55546 0.55546 ZT8-11 0.704045 0.704045 0.704045 ZT12-15 0.648135 0.648135 0.648135 ZT16-19 0.375698 0.375698 0.375698 ZT20-23 0.10793035000000001 0.10793035000000001 0.10793035000000001