condition mean min max ZT0-3 1.0803177499999999 0.8390905 1.321545 ZT4-7 3.009335 3.009335 3.009335 ZT8-11 1.336884 1.336884 1.336884 ZT12-15 0 0 0 ZT16-19 2.310375 2.310375 2.310375 ZT20-23 4.64681 4.64681 4.64681