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 6 monts of exercising. The anxiety inventory is measured on an interval scale and higher numbers indicate higher anxiety. In additon scores on the inventory are normally distributed. the scores appera below:
Before: 46,41,42,47,43,45
After: 44,40,39,46,42,43
a) what statistical test should be used to analyze these data?
b) identify Ho and Ha for this study
c) conduct the appropriate analysis
d) should Ho be refected? What should the researcher conclude?
e) if significant, compute the effect size and interpret this.