condition mean min max ZT0-3 0.6091335 0.310347 0.90792 ZT4-7 0.631315 0.631315 0.631315 ZT8-11 1.550185 1.550185 1.550185 ZT12-15 0 0 0 ZT16-19 0.3042575 0.3042575 0.3042575 ZT20-23 0.305109 0.305109 0.305109