• An I/O practitioner is interested in whether music played during an interview will improve interview performance. Candidates in one group respond to 5 structured interview questions while music plays in the background and candidates in another group respond to 5 structured interview questions without music playing in the background. Candidates are given a rating from 1 (poor) to 5 (excellent) for each question and the mean rating is calculated to determine each candidate's interview score. The researcher set alpha at 0.05. Interview scores for both groups are compared using a statistical software program. The mean score for the candidates that listened to music during the interview is 4.2, while the mean interview score for the candidates that did not hear music during the interview is 3.5.
• The obtained p-value is 0.02. Be sure to answer the following questions:
• State the null and alternative hypothesis.
• Determine if this is a directional or non-directional test. Please explain your answer.
• Establish the conclusion of this study based on the p-value and the means provided.
• Describe the Type I error for this study.
• Describe the Type II error for this study.