I am currently doing a confirmatory factor analysis using AMOS. I have 229 cases, no missing data, with a standardized questionnaire of 20 items, 4 factors. However, some indices specify that it does not fit well: chi-square= 343.322, df=64; GFI=.874; CFI=.817; RMSEA= 0.69.
What should I do? Maybe add the number of my respondents? try out another model?