The average local cell phone call length was reported to be 2.27 minutes. A random sample of 20 phone calls showed an average of 2.98 minutes in length with a standard deviation of 0.98 minutes. At = 0.05, can it be concluded that the average differs from the population average?

Conduct a hypothesis test using the t-test method. Be sure to follow the 5 step method as outlined in the notes.