Analyst: A recent survey showed that although professors of biology who teach but do not pursue research made up one twentieth of all science professors, they were appointed to fewer than one twentieth of all the scientific administrative positions in universities. We can conclude from this survey that failing to pursue research tends to bias university administrators against appointing these professors to scientific administrative positions.
The statement "Biologists who do research fill a disproportionately low number of scientific administrative positions in universities" most seriously weakens the support for the analyst's conclusion.