condition mean min max ZT0-3 92.860598 92.860598 92.860598 ZT4-7 135.248722 135.248722 135.248722 ZT8-11 148.795728 148.795728 148.795728 ZT12-15 147.6496565 147.6496565 147.6496565 ZT16-19 114.085868 114.085868 114.085868 ZT20-23 93.9515285 93.9515285 93.9515285