condition mean min max ZT0-3 9.7425 9.7425 9.7425 ZT4-7 10.092557 10.092557 10.092557 ZT8-11 11.767254000000001 11.767254000000001 11.767254000000001 ZT12-15 10.352026 10.352026 10.352026 ZT16-19 11.216905 11.216905 11.216905 ZT20-23 11.623167 11.623167 11.623167