I conducted an e-diary study in order to evaluate changes in mood states and life-satisfaction (first-order autoregressive bivariate model). I am interested in within and between person changes. I was planning to analyze the data using SEM techniques but I have 30 participants only and a lot of missing data that are not missing at random. Would it be possible to perform these analyses in Mplus? Would the syntax work with such a small sample? If not, any alternative solutions to this problem?