Last week, I shared a pair of lost customer survey and in-depth interview invitation templates. This week, I will provide a process to determine minimum sample size needs for your lost customer ...

In 2016 the Bank of Russia developed two ordinances setting forth a procedure that uses a limited sample of loans to determine whether or not the level of loss provision for a portfolio of uniform ...

Choosing the proper sample size for an investigation is one of the crucial jobs required of a statistician. Regardless of whether the statistician is deciding the number of patients to select in a ...

We present a simple sample-size formula for weighted log-rank statistics applied to clustered survival data with variable cluster sizes and arbitrary treatment assignments within clusters. This ...

In two-stage adaptive treatment strategies, patients receive an induction treatment followed by a maintenance therapy, given that the patient responded to the induction treatment they received. To ...