condition mean min max ZT0-3 90.65 90.65 90.65 ZT4-7 64.3 64.3 64.3 ZT8-11 62.900000000000006 62.900000000000006 62.900000000000006 ZT12-15 56.55 56.55 56.55 ZT16-19 83.30000000000001 83.30000000000001 83.30000000000001 ZT20-23 67.35 67.35 67.35