condition mean min max ZT0-3 10.321841815500001 10.294930841000001 10.348752789999999 ZT4-7 11.809416185 11.28093008 12.33790229 ZT8-11 12.538731603333332 12.388457176666666 12.68900603 ZT12-15 11.234729232500001 10.442304145000001 12.027154320000001 ZT16-19 9.9548197555 9.938814240666666 9.970825270333334 ZT20-23 9.074311785666666 8.768271206 9.380352365333334