Some research suggests that police officers are more likely to make an arrest in the presence of bystanders. If mentally disordered suspects attract more attention from bystanders. they may be more likely to be arrested than nonmentally disordered suspects. Assume that the average number of bystanders when police encounter a suspect is 3.53. In a sample of 20 police encounters with mentally disordered suspects, Engel and Silver {2051) found an average of 1?.[13 bystanders (standard deviation = 5.42). Perform a hypothesis test to determine if there are more bystanders when the suspect is mentally disordered. Use a Dill level of statistical signicance. 1What's your critical value? Group of answer choices 4.539 4.523 2.535 2.523