condition mean min max ZT0-3 0.0346668 0.0346668 0.0346668 ZT4-7 0.01513565 0.01513565 0.01513565 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0198661 0.0198661 0.0198661 ZT16-19 0.07892145 0.07892145 0.07892145 ZT20-23 0.104729 0.104729 0.104729