The F-Test approach to confidence intervals has first been proposed by Box and Beale, and further outlined by Beechem as well as Bates and Watts. Taking the least-squares estimated set of parameters θ , the confidence interval then includes all values θ that are equal to the best-fit estimation θ . This can be formulated as following hypotheses H 0 : θ = θ and the alternative H A : θ = θ . The decision is based on the F-Test (eq. 34), where the ratio of SSE(θ ) and SSE( θ ) has to be smaller than the value, that defines the (1α)•100% confidence interval. 51