condition mean min max ZT0-3 609.6644444333333 609.6644444333333 609.6644444333333 ZT4-7 495.76777776666665 495.76777776666665 495.76777776666665 ZT8-11 749.885 749.885 749.885 ZT12-15 797.8477777666667 797.8477777666667 797.8477777666667 ZT16-19 885.1600000999999 885.1600000999999 885.1600000999999 ZT20-23 848.3399999 848.3399999 848.3399999