condition mean min max ZT0-3 1.0379695 0.841923 1.234016 ZT4-7 0.096615 0.096615 0.096615 ZT8-11 1.133854 1.133854 1.133854 ZT12-15 0 0 0 ZT16-19 1.306705 1.306705 1.306705 ZT20-23 1.1261405 1.1261405 1.1261405