Scientific Observation — Definition & Examples

You need to buy your friend a gift-card for her birthday. You can't decide between two cafés: one that serves the "world's best tea", and another that serves the "world's best coffee." To decide which place to get the gift-card from, you run a little experiment on your friend and bring her to one of the two places every morning for a week. Each day, you ask her how she feels about the coffee or tea. Here are the results: