Many research s can be studied using a between-subjects or a within-subjects approach. let's think about this in context of the following research : some people believe that essential oils can reduce stress. imagine that a researcher wants to compare two types of essential oils - tea tree oil. vs. eucalyptus oil - to see which one is most effective at reducing stress. a researcher recruits a sample of 50 participants, and plans to measure their stress on a 1-10 scale. describe how the researcher would conduct their research in a within-subjects design, and how they would do things differently if they instead used a between-subjects design. what type of t-test would they use if they selected a within-subjects design? why? what type of t-test would they use if they selected a between-subjects design? why? what are the pros and cons of each approach? in vour opinion, which design is better for this earch , and why? (there is no wrong answer, as long as you justify your choice).