📝 Dummy Variables

📖 From Calculus • 6. Integration • 23 questions available

Practice MCQs for Dummy Variables. Test your knowledge with carefully crafted questions across easy, medium, and hard difficulty levels.

🔄 Last updated: 2026-07-16

Easy Questions

Medium Questions

Hard Questions

📝 Sample Questions

Q1. A dummy variable can only take which pair of values?

🔹 A. 0 and 1

🔹 B. -1 and 1

🔹 C. 0 and 2

🔹 D. Any two distinct numbers

💡 Difficulty: easy | ✅ Correct: A

Q2. A researcher studies salary differences among three education levels: High School, Bachelor, and Master. How many dummy variables should be included in the regression model?

🔹 A. 1

🔹 B. 2

🔹 C. 3

🔹 D. 4

💡 Difficulty: medium | ✅ Correct: D

Q3. When three dummy variables \(D_1, D_2, D_3\) are included without an intercept and satisfy \(D_1 + D_2 + D_3 = 1\), how are the coefficients interpreted?

🔹 A. Each coefficient gives the difference from a baseline category

🔹 B. Each coefficient directly estimates the mean outcome for its respective category

🔹 C. Coefficients represent odds ratios

🔹 D. Coefficients are not identifiable

💡 Difficulty: hard | ✅ Correct: A

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🔗 Related Topics

📝 Approximating Roots 📝 Areas and Limits 📝 Continuity in Applications 📝 Continuity of Compositions 📝 Continuity of Inverse Functions

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