test (1) analyse statistique (1) secteur des services (1) recherche (1) enregistrement (1) modèle (1) revenu (1) famille (1) point (1) Variation (1) Control (1) Prevention (1) Admission (1) Programs (1) Students (1) Statistics (1) Research (1) Recording and registration (1) Performance (1) Learning (1) Income (1) Impact (1) Gifts (1) Families (1) Example (1) Distance education (1) Opportunity (1) Knowledge and learning (1) Research (1) Number (1)