Question

Given the data below, what is the estimated bias given a reference value of 48.627?

Data
47.8424
50.0131
48.8784
47.6569
48.0765
48.4825
47.5835
46.9454
48.1102

Answer 1

Solution:

Estimated Bias is given by the average of the difference between measured values and referenced value.

Lets calculate the BIAS using below table,

Measured values	Reference Value	Difference
47.8424	48.627	-0.7846
50.0131	48.627	1.3861
48.8784	48.627	0.2514
47.6569	48.627	-0.9701
48.0765	48.627	-0.5505
48.4825	48.627	-0.1445
47.5835	48.627	-1.0435
46.9454	48.627	-1.6816
48.1102	48.627	-0.5168
	Total	-4.0541
	Mean = Total / 9 =	-0.450455556

Hence Bias = - 0.4504

Best Luck !