condition mean min max ZT0-3 120.770518 120.770518 120.770518 ZT4-7 113.3599155 113.3599155 113.3599155 ZT8-11 115.2956345 115.2956345 115.2956345 ZT12-15 108.370208 108.370208 108.370208 ZT16-19 138.02787999999998 138.02787999999998 138.02787999999998 ZT20-23 118.5808685 118.5808685 118.5808685