Which testing method one sample or two sample parameter

Question

This discussion has 2 parts:

1. What experience do you have with hypothesis testing? This can be as simple as you were given an amount of money and had to explain different ways to best utilize the money to make ends meet, to as complicated as a professional issue that needed to be solved.
2. Which testing method, one sample or two sample parameter tests, is the better test to use to formulate an answer to a hypothesis? Explain.