Hi, to whoever is using s+seqtrial, the following code gives wrong
scientific representation for the power (supposed to be "e-1"):
seqDesign(prob.model = "normal", arms = 2, log.transform = F,
null.hypothesis = c(105, 105), alt.hypothesis = 95, variance
= c(324, 324), ratio = c(1, 1), nbr.analyses = 1, sample.size
= 138, test.type = "two.sided", power = "calculate", alpha =
0.025, epsilon = c(1, 1), design.family = seqScale(scaleType
= "X"), P = c(1, 1, 1, 1), R = c(0, 0, 0, 0), A = c(0, 0, 0,
0), display.scale = seqScale(scaleType = "X"))
PROBABILITY MODEL and HYPOTHESES:
Two arm study of normally distributed response variable
Theta is difference in means (Treatment - Comparison)
Two-sided hypothesis test:
Null hypothesis : Theta = 0 (size = 0.05 )
Alternative hypothesis : Theta < -10 (power = 8.797e-8)
(Fixed sample test)
STOPPING BOUNDARIES: Sample Mean scale
a b c d
Time 1 (N= 138) -6.0064 -6.0064 6.0064 6.0064
Regards
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