After measurements or observations are made in a scientific investigation, it is most appropriate to

The correct answer will be- propose a hypothesis based on the previous research work

Explanation:

In a scientific investigation, the process of investigation begins with making an observation. The observation is made by measuring the variables based on which the observation is divided into two types: qualitative and quantitative measurements.

After the observation is made, a scientific question is asked and background research is done based on which the scientific hypothesis is predicted and proposed which explains the phenomenon to a limited extent.

Formation of the hypothesis is the most important step as it has to be tested through the experiment and whole scientific investigation is based on this step.

Thus, propose a hypothesis based on the previous research work is the correct answer.