## 3 Results and Discussion
For _employees_ and _retieves1_, the marital status changes the results of the classification. Similar studies can be performed for other aspects, for example, satisfaction with retirement (Appendix A, questions No. 15E and 15R). The results are shown in Figure 2: _males_ (Figure 2, top left panel), _females_ (Figure 2, top right panel), _married_ (Figure 2, bottom left panel), and _others_ (Figure 2, bottom right panel). The answer A1 corresponds to \"Very unhappy\", whereas A5 corresponds to \"Very happy\". We observe different clusters for _males_ and _females_, so gender is an important factor influencing the kind of answer to this question. In particular, for _males_ we observe the following clusters:  
* _retires1--A2_,
* _employees--A5_. For _females_ the clusters are:  
* _retires1--A4_,
* _retires2--A2_. The most frequent answer of _females_ attending the U3A (_retires2_) is the same as _retieves1 (males)_, i.e., A2. There are also several negative associations for _males_:  
Figure 4: Classification map (question No. 25R). * _employees--A4_,
* _retieves1--A3_. The least common answer for _retieves1 (males)_ is A3. For _females_ the negative associations are:
* _retieves2--A5_,
* _retieves1--A1_. The least common answer for _retieves1 (females)_ is A1. A5 is located close to the central point so the association for _retieves2 (females)_ is weak. If we consider the marital status, for this question, we also observe different clusters for _married_ and for _others_. The marital status is an important factor influencing the results of the classification in this case. In particular, for _married_ we observe the clusters (Figure 2, bottom left panel):  
* _employees--A5_,
* _retieves1--A4_,  
and for _others_ (Figure 2, bottom right panel)  
* _employees--A3_,
* _retieves1--A5_,
* _retieves2--A1_. The associations _retieves1--A5_ and _retieves2--A1_ are weak for _others_. The most frequent answer for _employees (married)_ is A5 \"Very happy\", while for _employees (others)_ the least common answer is A5 (negative association). Figure 3 is concerned about the question on the adequate amount of money after retirement (Appendix A, questions No. 19E and 20R). Analogously to Figures 1 and 2, the top panels refer to _males_ and to _females_ and the bottom ones to _married_ and to _others_. A1 corresponds to the answer \"Not at all\", and A5 to \"Quite enough\". For _males_ (top left panel) the clusters are the following:  
* _employees--A5_,
* _retieves2--A3_,  
and for _females_ (Figure 3, top right panel)  
* _retieves1--A1_,
* _retieves1--A2_,
* _retieves2--A5_. The negative associations for _males_ are:
* _employees--A4_,
* _retieves2--A2_,  
and for _females_  
* _employees--A4_,
* _retieves2--A1_,
* _retieves1--A5_. Employees and retirees estimate in a different way the economic situation during the retirement. Some differences are also between _males_ and _females_. Considering the marital status, the clusters are also different. In particular, the group _employees (married)_ clusters with A1, whereas _employees (others)_ clusters with A3. The summary is contained in the question about the return to the professional work (Appendix A, question No. 25R). The results are shown in Figure 4. The groups are split according to the kind of work--_Manual labor_ and _Intellectual labor_ (Appendix A, question No. 4 ER)--and according to the gender. Finally, four subgroups are considered and denoted in the figure as _Manual (females)_, _Manual (males)_, _Intellectual (females)_, and _Intellectual (males)_. The answer A1 is \"Yes, full-time\", and the answer A5 is \"Absolutely not\". We observe the cluster  
_Manual (males)--A4_. The negative associations are as follows:  
_Manual (females)--A2_,  
_Manual (males)--A1_,  
_Intellectual (males)--A4_. The most frequent answer of _Manual (males)_ is A4 \"No\". The associations of _Intellectual (females)_ with A3 and A2 are weak. None of the groups clusters with A1 \"Yes, full-time\".