condition mean min max ZT0-3 326.3723 326.3723 326.3723 ZT4-7 150.92683333333335 150.92683333333335 150.92683333333335 ZT8-11 136.2899 136.2899 136.2899 ZT12-15 84.71365999999999 84.71365999999999 84.71365999999999 ZT16-19 113.12038 113.12038 113.12038 ZT20-23 229.52790000000002 229.52790000000002 229.52790000000002