Problem: Here is a premise:
Or maybe the behavior of eBayers can be explained only by subtler and more carefully tested theories that have not yet been devised.

Here is a hypothesis:
The behavior of eBayers can be easily and reliably predicted.

Here are the options:

Answer: no

Problem: Here is a premise:
Federal Reserve researchers estimated that, as of the early 1990s, U.S. investment including education and R and D had declined as a share of GDP since the 1970s.

Here is a hypothesis:
Federal Reserve researchers found that US investment has declined, especially in higher education.

Here are the options:

Answer: it is not possible to tell

Problem: Here is a premise:
He did not notice that Stein was eyeing him with new appraisal.

Here is a hypothesis:
Stein wanted him for a new appraisal because he completed the others so well.

Here are the options:

Answer: it is not possible to tell

Problem: Here is a premise:
The information center, which serves as a base for archaeologists working at the site, has a number of interesting displays about the history of the wall.

Here is a hypothesis:
The center is of vital importance to the workers.

Here are the options:

Answer:
it is not possible to tell