To choose the correct statistical method, first identify the type of variables involved—whether they are categorical or continuous—and the nature of your research question. For comparing means across groups, use a t-Test for two groups or ANOVA for more than two groups, assuming normal distribution and equal variances. For examining relationships between variables, use correlation or regression analysis. For categorical data comparisons, use the Chi-Square test. If data does not meet normality assumptions, consider non-parametric tests.
AS the previous answers make clear, it is not possible to answer your question without more information about the nature of the variables you are using and the hypotheses you are testing. So, can you give us more information about your study in these terms?