condition mean min max ZT0-3 175.01024999999998 116.465 233.5555 ZT4-7 394.832 394.832 394.832 ZT8-11 174.84750000000003 174.84750000000003 174.84750000000003 ZT12-15 0 0 0 ZT16-19 508.8065 508.8065 508.8065 ZT20-23 353.9215 353.9215 353.9215