condition mean min max ZT0-3 87.65 87.65 87.65 ZT4-7 142.4 142.4 142.4 ZT8-11 89.45 89.45 89.45 ZT12-15 48.349999999999994 48.349999999999994 48.349999999999994 ZT16-19 89.1 89.1 89.1 ZT20-23 131.45 131.45 131.45