condition mean min max ZT0-3 109.740911 109.740911 109.740911 ZT4-7 148.1579125 148.1579125 148.1579125 ZT8-11 157.723387 157.723387 157.723387 ZT12-15 138.1169715 138.1169715 138.1169715 ZT16-19 160.8437445 160.8437445 160.8437445 ZT20-23 169.0803105 169.0803105 169.0803105