Question

A clear prediction of the expected results in an experimental design is known as what

Answer 1

It is known as hypothesis.

Before experiments, we should set up a hypothesis so that we can expect what happen. But hypothesis does not always has to be right, that's why we have to do experiments to test.

If a hypothesis matches the experiment result, a theory is formed. If it does not, we should adjust different variables in the experiment and set a new hypothesis again.