Question

A good experimental design should always

Answer 1

Repeatable with Randomly picked subjects.

Step-by-step explanation:

There are some characteristics of good experimental design. On this matter, we'll work with Statistics. Firstly, the Sample Group, for a matter of economy and deadline we'll work with sample groups. It must be randomly taken following valid statistical parameters, to assure its validity. In addition to this, its control group must be tested and therefore be valid for the experiment.

Finally, the subjects or individuals must be randomly chosen, so that, every time the experience runs either on the control or the experimental group.

Answer 2

A good experimental design should always BE REPEATABLE.

When scientists report the results of their investigations, other scientists always critically examined their works in order to confirm if the results obtained are valid or not. To accomplish this, other scientists have to carry out the experiment just the same way that the original investigator carried it out. This implies that, it is very important for scientists to design their experiments in such a way that it will be very easy for other scientists to copy and reproduce. Scientific experimental set ups must be repeatable.