Research data
| Universe | Spanish population over 15 years of age that has purchased a mobile phone during the past six months in a physical store or through the online channels |
| Data collection | Structured survey |
| Scope of study | Northern region of Spain |
| Sample size | 636 individuals |
| Sampling procedure | Cluster stratification (population centers and areas of residence in the main cities where the study was conducted), considering the size of the population according to sex and age, and random routes |
| Sample error | ± 4.00% (p = q = 0.5; confidence level = 95%) |
| Field work period | October 2012-December 2012 |
| Universe | Spanish population over 15 years of age that has purchased a mobile phone during the past six months in a physical store or through the online channels |
| Data collection | Structured survey |
| Scope of study | Northern region of Spain |
| Sample size | 636 individuals |
| Sampling procedure | Cluster stratification (population centers and areas of residence in the main cities where the study was conducted), considering the size of the population according to sex and age, and random routes |
| Sample error | ± 4.00% ( |
| Field work period | October 2012-December 2012 |
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