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.
When is a check considered stale dated and what if the bank pays the item after that time period? Answer: The Uniform Commercial Code, section 4-404, has effectively eliminated the old concept of stale dates on checks. However, the status of a check does change somewhat once it is 6 months old.