condition mean min max ZT0-3 32.897271 32.897271 32.897271 ZT4-7 24.396867999999998 24.396867999999998 24.396867999999998 ZT8-11 25.3178685 25.3178685 25.3178685 ZT12-15 56.441046 56.441046 56.441046 ZT16-19 35.519837 35.519837 35.519837 ZT20-23 95.523629 95.523629 95.523629