S2.2.2—Processing and interpreting data

Process only what the research question needs

Show calculations from raw to processed values, then interpret the appropriate table, chart, diagram or graph. Separate what the representation displays from the physical explanation proposed for the pattern.

Justify inclusion or removal

Do not remove a point merely because it weakens the trend. Keep it unless there is a documented measurement or procedural reason to exclude it; where the cause is uncertain, compare the analysis with and without the point and state how the conclusion changes.

Worked data decision

For diameter readings $0.18, 0.20, 0.21, 0.22, 0.26, 0.18\,\text{mm}$, $0.26\,\text{mm}$ is visibly separated from the cluster. If a documented reason supports exclusion, the mean of the remaining five is $0.198\,\text{mm}\approx0.20\,\text{mm}$. Without that justification, report the alternative mean or discuss the point rather than hiding it.