A researcher thinks that listening to classical music reduces anxiety. She measures the anxiety of 10 persons then plays Mozart's "Eine Kleine Nachtmusik" (listen hereif you want--you know the tune!) for them. Following that the researcher measures their anxiety again. (Note that 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): -1.1

standard error of the difference scores: 0.3

The formula for the CI upper bound is [standard error of the difference scores]*[t critical value]+[mean of the difference scores]

Would you reject the null hypothesis given your response to the question above?