Computer Science Homework Help

Schiller International University Data Mining and Data Algorithms Discussion

I’m working on a computer science question and need an explanation to help me understand better.

When using different data algorithms, why is it fundamentally important to understand why they are being used?
If there are significant differences in the data output, how can this happen and why is it important to note the differences?
Who should determine which algorithm is “right” and the one to keep? Why?