condition mean min max ZT0-3 147.674 147.674 147.674 ZT4-7 205.82049999999998 205.82049999999998 205.82049999999998 ZT8-11 129.935 129.935 129.935 ZT12-15 75.18465 75.18465 75.18465 ZT16-19 60.4375 60.4375 60.4375 ZT20-23 86.80199999999999 86.80199999999999 86.80199999999999