condition mean min max ZT0-3 76.70935 75.3164 78.1023 ZT4-7 145.961 145.961 145.961 ZT8-11 219.4075 219.4075 219.4075 ZT12-15 0 0 0 ZT16-19 132.325 132.325 132.325 ZT20-23 129.4155 129.4155 129.4155