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. Author manuscript; available in PMC: 2017 Sep 5.
Published in final edited form as: Stat Sci. 2017 Aug;32(3):385–404. doi: 10.1214/16-STS604

Table 2.

Estimated θ values (where θ = (θ0, θ1, θ2)) and their covariance using the full data sets that were simulated under different covariance structures of X.

Covariance Structure of X θ^ Estimated covariance of θ^
No correlation (−0.98, 0.28, 0.08) [5.4×10−4−6.5×10−5−2.1×10−5−6.5×10−51.9×10−48.5×10−6−2.1×10−58.5×10−61.8×10−4]
Positive correlation (−1.02, 0.30, 0.08) [5.6×10−4−7.3×10−5−1.9×10−5−7.3×10−52.6×10−4−1.2×10−4−1.9×10−5−1.2×10−42.4×10−4]
Negative correlation (−1.00, 0.29, 0.08) [5.4×10−4−6.4×10−5−1.9×10−5−6.4×10−52.4×10−41.1×10−4−1.9×10−51.1×10−42.3×10−4]