condition mean min max ZT0-3 1.0698349999999999 0.885335 1.254335 ZT4-7 1.217525 1.217525 1.217525 ZT8-11 0.61278 0.61278 0.61278 ZT12-15 0 0 0 ZT16-19 1.197652 1.197652 1.197652 ZT20-23 1.036004 1.036004 1.036004