condition mean min max ZT0-3 0.00987925 0.00987925 0.00987925 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0452578 0.0452578 0.0452578 ZT16-19 0.05997474999999999 0.05997474999999999 0.05997474999999999 ZT20-23 0.0417152 0.0417152 0.0417152