condition mean min max ZT0-3 0.23320407175000002 0.0 0.46640814350000004 ZT4-7 0.90988724925 0.7172344509999999 1.1025400475 ZT8-11 1.02944925775 0.9114227245 1.147475791 ZT12-15 2.06865624975 1.8590020025 2.2783104969999997 ZT16-19 2.27120079025 1.934777946 2.6076236345000003 ZT20-23 2.91944028 2.6315768090000002 3.207303751