The Doctor of Philosophy (Ph.D.) in Biostatistics is an advanced graduate degree for those who intend to pursue teaching and research careers. The major objective is to prepare an individual to develop and apply biostatistical principles and methods to public health problems.If you aspire to teach at the college level, then the Doctor of Philosophy in Biostatistics is the advanced graduate degree for you — intended for students who want to pursue teaching and research careers. The major objective is to prepare an individual to develop and apply biostatistical principles and methods to public health problems.