condition mean min max ZT0-3 0.1410544385 0.070173613 0.211935264 ZT4-7 0.019540354750000002 0.0 0.039080709500000005 ZT8-11 3.572001594 0.21253759949999998 6.9314655885 ZT12-15 13.4211352315 9.4920723435 17.3501981195 ZT16-19 5.094472691 3.6015967325 6.5873486495 ZT20-23 0.8754006125 0.512543597 1.2382576280000002