condition mean min max ZT0-3 18.9407 18.9407 18.9407 ZT4-7 116.675 116.675 116.675 ZT8-11 12.56655 12.56655 12.56655 ZT12-15 2.719045 2.719045 2.719045 ZT16-19 2.788555 2.788555 2.788555 ZT20-23 4.92892 4.92892 4.92892