condition mean min max ZT0-3 0.029556459249999997 0.0 0.05911291849999999 ZT4-7 0.16904813875000002 0.1432322575 0.19486402000000003 ZT8-11 0.745534468 0.5586583860000001 0.93241055 ZT12-15 2.39141620775 1.907888949 2.8749434665 ZT16-19 1.53802692075 1.4474432775 1.628610564 ZT20-23 1.1002236349999999 1.03032692 1.17012035