Normally it is prescribed to use statistical tools to test hypothesis. But, I believe, if the hypotheses of a research are qualitative in nature, the researcher may use both quantitative and qualitative data to prove or nullify those. For instance, if a hypothesis says that 'there are differences between A and B type of employments', or say if a hypothesis presumes that "employment does not necessarily lead to empowerment', scholar may use quantitative and qualitative data gathered from field to prove or disprove those hypotheses. S/he may not use statistical tools to test those hypotheses. We should keep in mind that in social science, utility of statistical tools is determined by the extent of their usefulness in a context. Statistical analysis should be done only if they are needed.