condition mean min max ZT0-3 0.9415555225000001 0.749488802 1.133622243 ZT4-7 1.6228720365 1.0799971695 2.1657469035 ZT8-11 5.029386321 3.4275407804999998 6.6312318615 ZT12-15 6.556410456 6.498423928 6.614396984 ZT16-19 2.7772075812500003 2.4584437435 3.0959714190000005 ZT20-23 2.61908507375 2.460668928 2.7775012195