condition mean min max ZT0-3 10.3224 10.3224 10.3224 ZT4-7 7.8729 7.8729 7.8729 ZT8-11 7.330735000000001 7.330735000000001 7.330735000000001 ZT12-15 7.08431 7.08431 7.08431 ZT16-19 8.405685 8.405685 8.405685 ZT20-23 10.293700000000001 10.293700000000001 10.293700000000001