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.
Risk. The biggest risk you face when cashing a stale check is that the bank refuses it and charges you a returned check fee. Banks usually charge a fee to the payee when they cannot cash a check. This fee is usually $15 to $20 in 2011. If you have a check for a small amount, such as a dividend from a stock, you risk the bank hitting you with fees that exceed value of the check.