how do you use data to confirm a hypothesis

They want proof you're evidence-driven, not guess-driven. Your method: 1) Form a hypothesis, then design the simplest test that would PROVE or DISPROVE it — a test that can't fail isn't a useful test. 2) Gather real measurement data, not anecdote. 3) Let the data decide — if it contradicts your hypothesis, you change your hypothesis (you don't force the data to fit). 4) Only act once the data supports the cause. The key line: 'A hypothesis isn't a conclusion until the data confirms it — and if the data disagrees with me, the data wins.' This is the scientific method, and it's why you're a good fit (your background is measurement + materials). This is also Lesson 41's proof step — consistent and strong.