condition mean min max ZT0-3 23.7723 23.43895 24.10565 ZT4-7 39.736850000000004 39.736850000000004 39.736850000000004 ZT8-11 51.22595 51.22595 51.22595 ZT12-15 0 0 0 ZT16-19 54.79735 54.79735 54.79735 ZT20-23 40.77034999999999 40.77034999999999 40.77034999999999