condition mean min max ZT0-3 836.25 836.25 836.25 ZT4-7 1203.9 1203.9 1203.9 ZT8-11 1122.25 1122.25 1122.25 ZT12-15 987.5999999999999 987.5999999999999 987.5999999999999 ZT16-19 861.65 861.65 861.65 ZT20-23 779.45 779.45 779.45