condition mean min max ZT0-3 165.964 155.0965 176.8315 ZT4-7 185.622 185.622 185.622 ZT8-11 50.3523 50.3523 50.3523 ZT12-15 0 0 0 ZT16-19 83.95214999999999 83.95214999999999 83.95214999999999 ZT20-23 152.274 152.274 152.274