condition mean min max ZT0-3 0.019437933333333334 0.019437933333333334 0.019437933333333334 ZT4-7 0.0471587 0.0471587 0.0471587 ZT8-11 0.0 0.0 0.0 ZT12-15 0.01008225 0.01008225 0.01008225 ZT16-19 0.0 0.0 0.0 ZT20-23 0.039383299999999996 0.039383299999999996 0.039383299999999996