condition mean min max ZT0-3 50.41815 50.41815 50.41815 ZT4-7 73.2046 73.2046 73.2046 ZT8-11 62.111450000000005 62.111450000000005 62.111450000000005 ZT12-15 48.3781 48.3781 48.3781 ZT16-19 32.542 32.542 32.542 ZT20-23 36.42475 36.42475 36.42475