condition mean min max ZT0-3 402.37216666666666 332.4705 487.2 ZT4-7 318.595 318.595 318.595 ZT8-11 345.4075 345.4075 345.4075 ZT12-15 495.95275000000004 485.2835 506.622 ZT16-19 534.5844999999999 534.5844999999999 534.5844999999999 ZT20-23 602.5474999999999 602.5474999999999 602.5474999999999