condition mean min max ZT0-3 0.7414928333333333 0.0999435 1.45197 ZT4-7 1.293675 1.293675 1.293675 ZT8-11 0.998386 0.998386 0.998386 ZT12-15 0.6454925 0.632205 0.6587799999999999 ZT16-19 0.238668 0.238668 0.238668 ZT20-23 1.057467 1.057467 1.057467