condition mean min max ZT0-3 9.4327965615 7.7372794030000005 11.12831372 ZT4-7 9.853959938749998 7.746870532499999 11.961049345 ZT8-11 13.549773564999999 10.723234696999999 16.376312433 ZT12-15 11.21933044425 8.9510132335 13.487647655 ZT16-19 11.7015061605 9.948416440999999 13.45459588 ZT20-23 10.14586747925 8.8320542185 11.45968074