Dose Course 2018_Flipping book

Standard and Expanded Uncertainty

Want to define an interval about a measurement result within which the true value can be predicted to be within a certain level of confidence

Standard Uncertainty = u = 1 s Expanded Uncertainty = U = ku where k=1 (67%),2 (95%) or 3 (99%) k= coverage factor ±

95% confidence interval of uncertainty

standard uncertainty

4 sd

2 sd

1 sd

mean value

Review of Radiation Oncology Physics: A Handbook for Teachers and Students.