A firm has an information file on each of a large number of clients. Call the population proportion of files with errors $\backslash$pi $.$ The CEO decides that if there is evidence that $\backslash$pi $>\mathrm{.}15,$ it will be worthwhile to review and fix every file. Choose the best answer for each of the following statements.

A$.$ If all firm files are reviewed and it is found that $20\%$ of the files have an error, a hypothesis test does not need to be performed for the CEO to have evidence.