condition mean min max ZT0-3 602.69029 602.69029 602.69029 ZT4-7 255.18019999999999 255.18019999999999 255.18019999999999 ZT8-11 188.411185 188.411185 188.411185 ZT12-15 200.7248115 200.7248115 200.7248115 ZT16-19 423.2553315 423.2553315 423.2553315 ZT20-23 501.7284385 501.7284385 501.7284385