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.
Personal checks older than six months are sometimes called âstale-datedâ checks. Banks/credit unions have no obligation to deposit or cash a check older than six months, but whether or not to cash a stale-dated check is ultimately at the individual bankâs/credit unionâs discretion, depending on the funds available and the financial institutionâs relationship with the customer.