condition mean min max ZT0-3 130.683087 130.683087 130.683087 ZT4-7 155.4626355 155.4626355 155.4626355 ZT8-11 188.8248785 188.8248785 188.8248785 ZT12-15 173.1015255 173.1015255 173.1015255 ZT16-19 168.2647935 168.2647935 168.2647935 ZT20-23 212.3282595 212.3282595 212.3282595