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. Author manuscript; available in PMC: 2024 Jul 12.
Published in final edited form as: Obs Stud. 2023;9(4):25–48. doi: 10.1353/obs.2023.a906627

Table 3:

Empirical concentration (OPT) using the projection-based sample size procedure at a nominal level of 90 using a pilot study of size n0=200 and n0=400. We test whether the true value of the estimated regime is within ϵ of the true value of the true optimal regime. The remaining columns give the mean, median, quartiles, and standard deviation of the estimated sample sizes across the 500 simulation repetitions.

ϵ n0 En^ Q1n^ Medn^ Q3n^ SDn^ OPT

0.30 200 1844.93 1561.50 1796.00 2060.00 365.42 100.00
0.50 200 754.27 663.50 748.00 836.00 128.73 100.00
0.70 200 431.14 387.00 426.00 473.00 65.13 100.00

0.30 400 1319.70 1191.50 1294.50 1451.75 193.43 100.00
0.50 400 543.24 500.00 526.50 586.00 69.92 100.00
0.70 400 320.63 293.25 319.00 345.75 37.88 100.00