condition mean min max ZT0-3 372.92449999999997 372.92449999999997 372.92449999999997 ZT4-7 329.216 329.216 329.216 ZT8-11 291.20550000000003 291.20550000000003 291.20550000000003 ZT12-15 306.358 306.358 306.358 ZT16-19 427.0645 427.0645 427.0645 ZT20-23 378.3535 378.3535 378.3535