condition mean min max ZT0-3 16.0225 16.0225 16.0225 ZT4-7 20.415399999999998 20.415399999999998 20.415399999999998 ZT8-11 17.19176 17.19176 17.19176 ZT12-15 17.718 17.718 17.718 ZT16-19 28.280866666666665 28.280866666666665 28.280866666666665 ZT20-23 25.4778 25.4778 25.4778