condition mean min max ZT0-3 40.014685 40.014685 40.014685 ZT4-7 43.080235 43.080235 43.080235 ZT8-11 43.1229755 43.1229755 43.1229755 ZT12-15 40.0745565 40.0745565 40.0745565 ZT16-19 43.814888999999994 43.814888999999994 43.814888999999994 ZT20-23 44.94517999999999 44.94517999999999 44.94517999999999