Which of the following has no part in the scientific method of experimentation?

WeeverBeezle, Not true. There are many situations where purpose is required. Experiments have defined purposes: eg to measure specific phenomena or to refine measurements, etc, etc. Those that don't have clearly defined purpose(s) tend to fail.

WeeverBeezle, "purpose" is part of the scientific process, though it is often referred to as the research question, objective, or aim. It represents the reason or motivation behind conducting the investigation. In the scientific process, defining the purpose is crucial as it sets the direction and focus of the study. Purpose/Question: Formulate a specific question or objective to explore (e.g., "Why does this happen?" or "How does X affect Y?").

Purpose is not part of the scientific process either.