E (observations)
0.831000 1.045000 1.021000 0.970000 0.825000 0.891000 0.710000 0.801000 1.074000 1.148000 1.000000 0.928000 0.767000 0.701000 0.807000 0.902000 0.997000 1.224000 1.089000 0.973000 0.980000 0.665000 NOx (response)
4.818000 2.849000 3.275000 4.691000 4.255000 5.064000 2.118000 4.602000 2.286000 0.970000 3.965000 5.344000 3.834000 1.990000 5.199000 5.283000 3.752000 0.537000 1.640000 5.055000 4.937000 1.561000 