Eksik Veri Analizi

Psikometri ve nicel araştırma yöntemlerinde, eksik veri (missing data) problemiyle karşılaş When when handling missing data, available-case analysis allows researchers to maximize the sample size for each specific statistical computation. Unlike listwise deletion (tam vaka silme), which removes an entire case if any single variable is missing, available-case analysis includes cases as long as the variables required for a specific calculation are present. This method preserves statistical power by utilizing all non-missing information for each pairwise correlation or descriptive statistic. However, it introduces methodological complications because the sample size fluctuates across different analyses within the same study, complicating covariance matrices and multivariate modeling, occasionally leading to out-of-bounds matrices.