NCEA Level 3 Statistics Practice Questions - NCEA Level 3 Statistics (National Certificate Of Educational Achievement) Exam

Selection bias (undercoverage), because teenagers and working adults are unlikely to own landlines or be home during working hours. Non-response bias, because teenagers who answer the phone will refuse to answer questions about smartphone usage. Question order bias, because calling during working hours changes the sequence of survey questions. Hawthorne effect bias, because respondents alter their smartphone usage after participating in the phone call.