condition mean min max ZT0-3 14.571502500000001 12.148105 16.9949 ZT4-7 9.731455 9.731455 9.731455 ZT8-11 30.727600000000002 30.727600000000002 30.727600000000002 ZT12-15 0 0 0 ZT16-19 4.48066 4.48066 4.48066 ZT20-23 1.331525 1.331525 1.331525