Reference no: EM132487991

A researcher believes exercise reduces anxiety in women. She identifies a group of women who had not exercised before but are now planning to begin exercising. She gives them a 50-item anxiety inventory before they begin exercising and administers it again after six months of exercising. The anxiety inventory is measured on an interval scale and higher numbers indicate higher anxiety. In addition, scores on the inventory are normally distributed. The scores are given below. Calculate Confidence Interval based on differences. Calculate the 95% confidence interval for the differences, rounded to one decimal. Write lower bound-upper bound sepparated by comma.

Before.After

46 44

41 40

42 39

47 46

43 42

45 43