condition mean min max ZT0-3 127.616672 127.616672 127.616672 ZT4-7 131.0768085 131.0768085 131.0768085 ZT8-11 124.8369705 124.8369705 124.8369705 ZT12-15 176.4198265 176.4198265 176.4198265 ZT16-19 144.9763505 144.9763505 144.9763505 ZT20-23 134.4118325 134.4118325 134.4118325