condition mean min max ZT0-3 22.47455 22.47455 22.47455 ZT4-7 18.21445 18.21445 18.21445 ZT8-11 19.74945 19.74945 19.74945 ZT12-15 19.5563 19.5563 19.5563 ZT16-19 24.881999999999998 24.881999999999998 24.881999999999998 ZT20-23 25.1659 25.1659 25.1659