Module 05 Activity

Scenario

Choose and run the right test, and report it without overclaiming.

What you build

A test choice justified by four questions, and a results table with intervals.

Steps

1. State H0 as a specific number and H1 including its sidedness, before looking at the data.
2. Answer the four questions — outcome type, group count, paired or independent, assumptions — and pick the test from them.
3. Fix alpha in advance. Count how many tests you will run and say what you will do about multiplicity.
4. Run the test and read the confidence interval before the p-value.
5. Tidy every planned test into one table with the estimate, the interval and the p-value, and state the sign convention.
6. Write the findings with the estimate, interval, p-value and n, avoiding 'significant' as a substitute for a magnitude.

Evidence to hand in

• H0 and H1, with sidedness, dated before the analysis.
• The four answers and the test they select.
• The number of tests run and your multiplicity decision.
• The results table with its stated sign convention.
• The findings paragraph.

Review checklist

• The alternative's sidedness was fixed before the data was seen.
• The paired/independent question was answered explicitly.
• The number of tests run is reported.
• Every result carries its confidence interval.
• No non-significant result is described as 'no effect'.

Mark complete