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.
By the time that you realize that a stale-dated check has cleared your account, it is probably too late for your bank to reverse the charge. The mere fact that the check is several years old does not entitle you to a refund at all, and youâre fully responsible for any problems that arise as a result, e.g. overdraft fees, other checks not clearing, etc., although your bank may decide to waive fees as a courtesy.