Answer this abs if I should reject the null hypothesis and why

Question 5 (4 points) A researcher thinks that listening to classical music reduces anxiety. She measures the anxiety of 10 people. Then she plays Mozart for them. Following the music, the researcher measures their anxiety again. (Note: anxiety is measured on a scale from 1 to 7, with higher numbers indicating increased anxiety.) Does the study support her hypothesis? Compute the upper bound of the confidence interval using the following data: mean of the difference scores (subtract pretest from posttest): -0.3 standard error of the difference scores: 0.2 The formula for the Cl upper bound is [standard error of the difference scores]* [t critical value]+[mean of the difference scores] Your Answer: Answer D View hint for Question 5