condition mean min max ZT0-3 4060.60413 4060.60413 4060.60413 ZT4-7 4325.6757020000005 4325.6757020000005 4325.6757020000005 ZT8-11 4809.887253999999 4809.887253999999 4809.887253999999 ZT12-15 4720.3510355 4720.3510355 4720.3510355 ZT16-19 4057.2042445 4057.2042445 4057.2042445 ZT20-23 3828.658133 3828.658133 3828.658133