Ten candidate values for the number of retained terms were evaluated.
By this process of elimination, redundant terms were removed and the combination of retained terms aimed to minimise the number of retrieved irrelevant records.
Notice that by retaining terms of order h, it is possible to determine the original variables at order h − 1.
A first simplifying approximation can be made at this point by expanding in powers of and only retaining terms of order in the corresponding equation.
By retaining terms up to the second order, we get the second order approximation given as ej 2π(m - n)δ/N ≈ 1 + j 2π(m - n)δ/N - 2π2(m - n 2δ2/N2.
The final models were reduced to only retain terms that were significant at a 5% confidence level.
Forward stepwise regression models were chosen by retaining terms whose statistical significance persisted in the presence of other significant effects.
This significance level was chosen because it is conventionally used for retaining terms in a multiple regression analysis with many variables.
We have retained the term SRA in the present article, because this was what the authority was called when we conducted our investigation.
Other doctors will have retained the term bloating.
