You may want to consider working toward a graduate degree in statistics. Because statistics provides quantitative methods for describing the outcome of experiments, its study involves mathematics. Many undergraduate mathematics majors find statistics an interesting field because it's an important, useful application of mathematics to varied practical problems. Statistics is the language used to express the uncertainty in research and in decision making. In every field, from the humanities to the physical sciences, research information and the way it is collected and measured is imperfect.
Statistics is the discipline that evaluates the reliability of data.
It provides the language to convey research findings to the scientific community in almost every discipline. This is a key role because most research requires sound statistical documentation in order to be presented and interpreted accurately. A p-value, for example, is the probability associated with the truth of a hypothesis. Research results in statistics are typically presented as a p-value associated with some hypothesis. Collaboration with scientists in other fields is a natural outgrowth of the statistician's work.