condition mean min max ZT0-3 0.4167181345 0.368911525 0.464524744 ZT4-7 0.16188304425 0.1110626215 0.21270346699999998 ZT8-11 0.0783586345 0.0606986645 0.0960186045 ZT12-15 0.22404488 0.169680463 0.278409297 ZT16-19 0.45667962025000003 0.3034179025 0.609941338 ZT20-23 0.7216762625 0.5592209685 0.8841315565000001