Table 2.
Simulation Results from 200 simulation runs. Fitted model is probit-log-skew-normal.
| PROBIT component | β < α 1 (negatively skewed) |
β = α 2 (symmetric) |
||
|---|---|---|---|---|
| Bias | MSE 4 | Bias | MSE | |
| Intercept (-1)3 | 0.0303 | 0.0128 | 0.0054 | 0.0116 |
| βViral Infection (2.5) | -0.0186 | 0.0130 | -0.0064 | 0.0112 |
| s11 (1) | -0.0927 | 0.0243 | -0.0914 | 0.0235 |
| Log-beta component | ||||
| Intercept (-20) | ||||
| βViral Infection (0.75) | 0.0004 | 0.0050 | -0.0090 | 0.0055 |
| s22 (0.2) | -0.0059 | 0.0010 | -0.0085 | 0.0012 |
| s12 (0.2) | -0.0167 | 0.0028 | -0.0199 | 0.0033 |
1. β = 70, α = 130
2. β = α = 100
3. Numbers in parentheses refer to true parameter values
4. Mean Square Error (MSE)