condition mean min max ZT0-3 8.45613 8.24624 8.66602 ZT4-7 10.592055 10.592055 10.592055 ZT8-11 4.504515 4.504515 4.504515 ZT12-15 0 0 0 ZT16-19 1.525685 1.525685 1.525685 ZT20-23 6.983029999999999 6.983029999999999 6.983029999999999