condition mean min max ZT0-3 882.729724 882.729724 882.729724 ZT4-7 903.7275099999999 903.7275099999999 903.7275099999999 ZT8-11 1132.055042 1132.055042 1132.055042 ZT12-15 1041.1429705 1041.1429705 1041.1429705 ZT16-19 923.1971745000001 923.1971745000001 923.1971745000001 ZT20-23 845.8039795 845.8039795 845.8039795