The type of writing most often required of college students is

research papers and analytical essays.

analytical

The statement "The writer always states the hypothesis at the beginning of a scientific paper" is True.

A hypothesis is a supposition made by the scientist. In order for a hypothesis to be a scientific hypothesis, the scientific method requires for it to be tested. If a hypothesis cannot be tested, it cannot be scientific hypothesis. It is important to state the hypothesis clearly at the beginning of a scientific paper. This enables the reader to understand the problem.