condition mean min max ZT0-3 78.8379 78.8379 78.8379 ZT4-7 67.20365000000001 67.20365000000001 67.20365000000001 ZT8-11 61.694100000000006 61.694100000000006 61.694100000000006 ZT12-15 44.65195 44.65195 44.65195 ZT16-19 65.63355 65.63355 65.63355 ZT20-23 73.05275 73.05275 73.05275