Power is the probability that a study will reject the null hypothesis. The estimated. probability is a function of sample size, variability, level of significance, and the. difference between the null and alternative hypotheses. Similarly, the sample size. required to ensure a pre-specified power for a hypothesis test depends on variability, level of significance, and the null vs. alternative difference.
Nature of stale check. Stale check is a check that is presented to be cashed or deposited at a bank six months or more after the date it was written.
A check is generally considered stale dated if it was written more than six months prior to being presented to a bank or other financial institution. At this time, most banks have the option of refusing to deposit or cash the check, according to LegalMatch.