This dataset belongs to publication; "Comparing the Recommendations of Buyers of Energy-Efficient and Inefficient Vacuum Cleaners" In MDPI.com
Anonymised Net Promotor Score (NPS) data from 902 European consumers from Philips vacuum cleaners including the reasons for NPS. Used to test the difference between those who bought an energy efficient version or an inefficient version. The data also contains the specification of the bought vacuum cleaners (kg, input power Watt, suction Watt, Price in Euro). The data is obtained in 2010 when the vacuum cleaners in the EU where not limited in energy consumption yet. Customers where categorized in Green-Low Energy, who bought their vacuum cleaner for reasons of their environmental friendliness, the low energy buyers (who did so for other reasons) and the high energy buyers. Please read the article at MPDI for detailed descriptions.