What causes us to overeat? One surprising factor might be the material of the plate on which our food is served. Williamson, Block, and Keller XXXXXXXXXXgave participants two donuts each and measured...

What causes us to overeat? One surprising factor might be the material of the plate on which our food is served. Williamson, Block, and Keller (2016) gave  participants two donuts each and measured the amount of food that was wasted by each participant. In an independent-samples design, participants received their donuts either on a disposable paper plate or on a reusable plastic plate. Data like those observed by the authors are listed below.

1. 
   

   Test the hypothesis that participants who received donuts on a paper plate wasted more food than participants who were served donuts on a plastic, reusable plate. Use , two-tailed.

   
   


2. 
   

   Construct a 95% confidence interval to estimate the size of the mean difference.

   
   


3. 
   

   Write the results as they would appear in a scientific journal article.