Completing all six steps of a hypothesis test. A psychology professor was curious how psychology majors fared economically compared to business majors. Did they do better or did they do worse five years after graduation? She did some research and learned that the national mean for the salary of business majors five years after graduation was $55,000. She surveyed 22 recent psychology graduates at her school and found M = $43,000, s = 12,000. Complete the analyses and write a paragraph of interpretation.