A powder diet is tested on 49 people, and a liquid diet is tested on 36 different people. OFinterest is whether the liquid diet yields a higher mean weight loss than the powder diet. The powder diet gToup had a mean weight loss of42 pounds with a standard deviation ol-12 pounds. The liquid diet group had a mean weightless (ii45 pounds with a standard deviation of 14 pounds. a. \\that is the test statistic? l3. What is the pvalue? \"your answer is less than .01. enter 0. c. Do we reject the null hypothesis at a : .05? O A.Yes O B. No