customer_id,segment,visits_30d,avg_basket_eur,last_visit_days,app_user
C001,Student,12,6.40,1,yes
C002,Faculty,7,8.90,3,no
C003,Student,18,5.70,0,yes
C004,Staff,9,7.80,2,yes
C005,Visitor,2,9.40,14,no
C006,Student,15,6.10,1,yes