Review Question - QID 210164

An investigator is conducting a randomized, controlled trial to determine if there are any differences in patient-reported outcomes (PROs) between two implants used to treat displaced proximal humerus fractures. An a priori power analysis reveals that 84 patients will be required in each arm to show a difference between groups with a beta of 0.2 and an alpha of 0.05. After enrolling 88 patients in each arm, the results are analyzed and no difference (p=0.28) in PROs are found between the two groups. What is the chance that the null hypothesis is accepted when it is actually false?