EU2019                  illustrative econometric data from Eurostat for
                        5 variables in 17 countries in 2019 columns:
                        Country, LifExp , HDP, Unempl, Obesity,
                        APassangers remove the first column:
                        rownames(EU2019)= EU2019[,1];
                        EU2019=EU2019[,-1] data has real meaning
Gilmour9p               Ilustrative data published in the original
                        article (House prices) Data with the practical
                        meaning Gilmour9p was taken from the original
                        study (see Table1).
Modified_Gilmour9p      special illustrative data if more than two
                        tests are done in the loop in the function
                        final_model() original Gilmour table was
                        modified data has no real meaning
Parks5p                 number of visitors in parks, citation: Stemberk
                        Josef, Josef Dolejs, Petra Maresova, Kamil
                        Kuca. Factors affecting the number of Visitors
                        in National Parks in the Czech Republic,
                        Germany and Austria. International Journal of
                        Geo-Information. ISPRS Int. J. Geo-Inf. 2018,
                        7(3), 124; doi:10.3390/ijgi7030124 data has
                        real meaning
Patents5p               number of patents in universities, citation:
                        Maresova Petra, Soukal Ivan, Stemberkova
                        Ruzena, Selamat Ali Perspective and Suitable
                        Research Area in Public Research-Patent
                        Analysis of the Czech Public Universities
                        Education and Urban Society, 54(7), Maresova
                        Petra, Soukal Ivan, Stemberkova Ruzena, Selamat
                        Ali data has real meaning
T1                      T1 contains simulated data without real meaning
                        the null hypothesis is not rejected in the
                        first test it illustrates the situation if full
                        model is final model data has no real meaning
T2                      T2 illustrates the situation if the loop of
                        tests is finished by the Trivial model data has
                        no practical meaning
Trivial                 Trivial illustrates the situation if the
                        Trivial model is model_min without testing
                        process data has no real meaning
crit                    This data contains critical values for testing
                        at the significance level 5 Data published in
                        the original article. Crit was taken from the
                        original study (see Table2). Values in Crit
                        were recalculated by Josef Dolejs for more
                        possible steps of freedom
final_model             The function calculates all models and find
                        final model according Gilmour
submodels               The function calculates all possible submodels
                        and find model with the minimal value of Cp
                        according Gilmour
