condition mean min max ZT0-3 433.616672 433.616672 433.616672 ZT4-7 639.3130739999999 639.3130739999999 639.3130739999999 ZT8-11 638.664505 638.664505 638.664505 ZT12-15 679.876034 679.876034 679.876034 ZT16-19 278.054782 278.054782 278.054782 ZT20-23 115.4822995 115.4822995 115.4822995