In a \(N(\mu,\sigma^2)\) population with unknown variance \(\sigma^2\), consider the two-sided one-sample \(z\)-test for testing the point null hypothesis \(H_0 : \mu = 0\) against \(H_1 : \mu \neq 0\). Based on an observed data, this function calculates the Hajnal's ratio in favor of \(H_1\) when the prior assumed on the standardized effect size \(\mu/\sigma\) under the alternative places equal probability at \(+\delta\) and \(-\delta\) (\(\delta>0\) prefixed).
HajnalBF_onet(obs, nObs, mean.obs, sd.obs, test.statistic, es1 = 0.3)
Numeric vector. Observed vector of data.
Numeric or numeric vector. Sample size(s). Same as length(obs)
when numeric.
Numeric or numeric vector. Sample mean(s). Same as mean(obs)
when numeric.
Positive numeric or numeric vector. Sample standard deviation(s). Same as sd(obs)
when numeric.
Numeric or numeric vector. Test-statistic value(s).
Positive numeric. \(\delta\) as above. Default: \(0.3\). For this, the prior on the standardized effect size \(\mu/\sigma\) takes values \(0.3\) and \(-0.3\) each with equal probability 1/2.
Positive numeric or numeric vector. The Hajnal's ratio(s).
Users can either specify obs
, or nObs
, mean.obs
and sd.obs
, or nObs
and test.statistic
.
If obs
is provided, it returns the corresponding Bayes factor value.
If nObs
, mean.obs
and sd.obs
are provided, the function is vectorized over the arguments. Bayes factor values corresponding to the values therein are returned.
If nObs
and test.statistic
are provided, the function is vectorized over the arguments. Bayes factor values corresponding to the values therein are returned.
Hajnal, J. (1961). A two-sample sequential t-test.Biometrika, 48:65-75, [Article].
Schnuerch, M. and Erdfelder, E. (2020). A two-sample sequential t-test.Biometrika, 48:65-75, [Article].
# NOT RUN {
HajnalBF_onet(obs = rnorm(100))
# }
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