Please answer the following question and show your work! Include explanations as well, I'm having trouble completing this question. Thanks

Suppose that a graduate student collects data for a study designed to test the hypothesis that individuals etain more information if they study while listening to classical music. The student uses a paired-samples lesign and finds that, on average, participants remembered 3.1 more items when listening to music ompared to studying in silence. If the estimated population standard deviation is 2.68 and there were 12 articipants in the study, what is the 95% confidence interval for the population mean difference? O [1.41, 4.79] [-2.74, 8.94] O [1.72, 4.48] [-2.80, 9.00]