condition mean min max ZT0-3 45.402982835 37.56097374 53.24499193 ZT4-7 59.952709356666674 51.141103890000004 68.76431482333334 ZT8-11 52.39210464833333 51.918466126666665 52.86574317 ZT12-15 62.14315903000001 53.52964646 70.7566716 ZT16-19 46.477831135 46.16398559 46.79167668 ZT20-23 42.176961565 40.55775304 43.796170090000004