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? 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. If a check that is more than 6 months old is presented to the paying bank for payment, the paying bank may refuse to pay it without being liable to its customer (the drawer of the check) for so refusing. It may also pay the check if it does so in good faith.