How Does MNAR Differ from Other Types of Missing Data?
MNAR is different from Missing Completely at Random (MCAR) and Missing at Random (MAR). In MCAR, the missingness is unrelated to any observed or unobserved data, while in MAR, the missingness is related to observed data but not the unobserved data. MNAR, however, is dependent on the unobserved data, making it the most challenging type to handle statistically.
