Explanation
This question involves testing for heteroskedasticity using the White test. Here's the step-by-step reasoning:
Step 1: Understanding the Test Statistic
- The White test statistic is calculated as nR², where:
- n = sample size (100 in this case)
- R² = coefficient of determination from the second regression
- The test statistic follows a χ² distribution with degrees of freedom = k(k+3)/2
Step 2: Determining Degrees of Freedom
- With one explanatory variable (k = 1):
- Degrees of freedom = 1 × (1+3)/2 = 4/2 = 2
- So we use χ²₂ distribution
Step 3: Finding Critical Value
- At 5% significance level, the critical value for χ²₂ is 5.99
- We reject the null hypothesis when: nR² > 5.99
Step 4: Solving for R²
- nR² = 5.99
- 100 × R² = 5.99
- R² = 5.99 / 100 = 0.0599
Step 5: Interpretation
- When R² ≥ 0.0599, we reject the null hypothesis of no heteroskedasticity
- When R² < 0.0599, we fail to reject the null hypothesis
Therefore, the correct R² value at which we would reject the null hypothesis is 0.0599 (Option D).