condition mean min max ZT0-3 7.2694374999999996 5.02078 9.518094999999999 ZT4-7 2.9076899999999997 2.9076899999999997 2.9076899999999997 ZT8-11 1.012825 1.012825 1.012825 ZT12-15 0 0 0 ZT16-19 2.17129 2.17129 2.17129 ZT20-23 2.1825200000000002 2.1825200000000002 2.1825200000000002