Table 5.

The empirical type I error rates of the tests at the significance level 0.05 when the survival times have uniform, exponential, log-normal,uniform and exponential, uniform and log-normal, or exponential and log-normal distributions with equal medians but unequal variances and sample sizes n ₁ = 20, n ₂ = 25, n ₃ = 25, n ₄ = 30

Distributions and parameters	Censoring rate	BC	TJ	New
Uniform distribution   θ = (10,10,10,10)   a = (4,4,4,4)   c = (2,3,4,5)	0	0.087	0.062	0.067
	0.1	0.087	0.075	0.057
	0.2	0.087	0.086	0.051
	0.3	0.099	0.118	0.053
Exponential distribution   θ = (10-2log(2),10-3log(2),10-4log(2),10-5log(2))   a = (1/2,1/3,1/4,1/5)	0	0.084	0.062	0.064
	0.1	0.086	0.067	0.060
	0.2	0.089	0.078	0.062
	0.3	0.100	0.100	0.054
Log-normal distribution   θ = (log(10), log(10), log(10), log(10))   a = (2,3,4,5)/10	0	0.078	0.057	0.060
	0.1	0.088	0.077	0.064
	0.2	0.090	0.093	0.063
	0.3	0.087	0.109	0.052
Two uniform and two exponential distributions   θ = (10, 10, 10-10*log(2),10-10*log(2))   a = (0.1,0.1,0.1,0.1)   c = (0.01,0.01,0.01,0.01)	0	0.074	0.052	0.058
	0.1	0.088	0.089	0.049
	0.2	0.093	0.106	0.046
	0.3	0.092	0.119	0.039
Two uniform and two log-normal distributions   θ = (10,10, log(10), log(10))   a = (5,5,0.3,0.3)   c = (2,2,2,2)	0	0.076	0.056	0.058
	0.1	0.085	0.083	0.050
	0.2	0.088	0.105	0.049
	0.3	0.097	0.132	0.047
Two log-normal and two exponential distributions   θ = (log(10), log(10),10-log(2)/0.3,10-log(2)/0.3)   a = (0.3,0.3,0.3,0.3)	0	0.068	0.049	0.051
	0.1	0.078	0.062	0.055
	0.2	0.083	0.080	0.054
	0.3	0.096	0.111	0.059