Doing Oneway ANOVAs :Designing, Running, and Analyzing Experiments(Interaction Design Specialization) Answers 2026

Q1. Number of stroke alphabets

Command:

👉 Look at the single number printed in console
👉 Enter that number
👉 This equals the total number of stroke alphabets compared

Q2. Average WPM for EdgeWrite

Command:

👉 R prints one numeric value
👉 Round to 2 decimal places
👉 Enter that rounded value

Example:

Q3. Shapiro-Wilk tests (by Alphabet)

Command:

You will see one test per alphabet, each showing:

👉 For each alphabet:

• p < 0.05 → ❌ Violates normality

• p ≥ 0.05 → ✅ Does NOT violate normality

👉 In the quiz, tick only those alphabets with p < 0.05
👉 If none are < 0.05 → choose “None of the above”

Q4. Shapiro-Wilk test on residuals

Commands:

Output:

👉 Copy p-value only
👉 Round to 4 decimal places

Q5. Brown–Forsythe test (equal variances)

Command:

Output table includes:

👉 Enter Pr(>F)
👉 Round to 4 decimal places

Decision rule (for understanding):

• p < 0.05 → variances unequal

• p ≥ 0.05 → variances equal

Q6. Oneway ANOVA

Command:

You’ll see a table like:

👉 Enter the F value
👉 Round to 2 decimal places

Q7. Tukey + Holm (Unistrokes vs Graffiti)

Commands:

Output shows rows like:

👉 Find Unistrokes − Graffiti
👉 Copy Pr(>|z|)
👉 Round to 4 decimal places

Q8. Significant pairwise differences

Using Q7 results:

👉 Any comparison with:

✅ is significant

👉 Tick only those pairs
👉 If none < 0.05 → choose “None of the above”

Q9. Kruskal-Wallis test

Command:

Output:

👉 Copy p-value
👉 Round to 4 decimal places

Q10. Mann-Whitney + Holm

Command:

Output:

👉 Values are returned in the same order:

1. Unistrokes vs Graffiti

2. Unistrokes vs EdgeWrite

3. Graffiti vs EdgeWrite

👉 Take first value
👉 Round to 4 decimal places

🧾 FINAL SUMMARY TABLE (Ready to Fill)