condition mean min max ZT0-3 1.003097217 0.35541946399999996 1.65077497 ZT4-7 1.82025428175 1.653645332 1.9868632315 ZT8-11 1.1321191124999999 0.80931376 1.454924465 ZT12-15 0.27616207375 0.274690625 0.2776335225 ZT16-19 0.65953556925 0.433093229 0.8859779095 ZT20-23 0.56502038 0.4008457845 0.7291949755