condition mean min max ZT0-3 71.306625 69.3166 73.29665 ZT4-7 123.79599999999999 123.79599999999999 123.79599999999999 ZT8-11 149.554 149.554 149.554 ZT12-15 0 0 0 ZT16-19 120.857 120.857 120.857 ZT20-23 108.088 108.088 108.088