Actual distance (um) Predicted distance (um) Standard deviation (um) 50 65.985 6.28 150 125.67 4.18 250 255.89 4.615 350 345.535 16.505 450 474 4.72 550 555.775 7 650 655.42 3.715 750 744.97 5.72 850 837.765 4.985 950 929.09 3.92