condition mean min max ZT0-3 60.723600000000005 58.2961 63.1511 ZT4-7 39.058049999999994 39.058049999999994 39.058049999999994 ZT8-11 39.215450000000004 39.215450000000004 39.215450000000004 ZT12-15 0 0 0 ZT16-19 56.45575 56.45575 56.45575 ZT20-23 65.5927 65.5927 65.5927