condition mean min max ZT0-3 10.77643001225 10.7319506245 10.8209094 ZT4-7 10.27365484025 9.6933628675 10.853946813 ZT8-11 10.1095719745 8.555435734 11.663708215 ZT12-15 3.91598268125 1.786967122 6.0449982405 ZT16-19 1.327105703 1.009232455 1.6449789510000001 ZT20-23 0.5270798640000001 0.351792169 0.702367559