condition mean min max ZT0-3 320.67665135000004 261.43334980000003 379.9199529 ZT4-7 419.74067157499996 383.0971383 456.38420485 ZT8-11 335.802953475 333.3360463 338.26986065 ZT12-15 288.542677925 256.84615510000003 320.23920075 ZT16-19 228.239413025 216.6586506 239.82017545000002 ZT20-23 165.58435985 154.0880947 177.080625