condition mean min max ZT0-3 61.75 61.75 61.75 ZT4-7 120.4 120.4 120.4 ZT8-11 61.349999999999994 61.349999999999994 61.349999999999994 ZT12-15 86.75 86.75 86.75 ZT16-19 74.0 74.0 74.0 ZT20-23 64.3 64.3 64.3