Pew Research Center designed this study to assess the current state of online survey sampling methods – both probability-based and opt-in – and determine their accuracy on general population estimates ...

A computer-simulation study induced correlations between and within treatment groups and examined their influence on the probability of Type I and Type II errors for normal and non-normal ...

Guosheng Yin, Nan Chen, J. Jack Lee, Phase II trial design with Bayesian adaptive randomization and predictive probability, Journal of the Royal Statistical Society.