condition mean min max ZT0-3 10.005474 10.005474 10.005474 ZT4-7 10.240898999999999 10.240898999999999 10.240898999999999 ZT8-11 10.4279425 10.4279425 10.4279425 ZT12-15 10.04827 10.04827 10.04827 ZT16-19 9.659948 9.659948 9.659948 ZT20-23 10.5818115 10.5818115 10.5818115