When conducting significance test to find out if there is difference between two treatments, with quantitative response variable, treatments are given to different experimental units, we summarize data by:
A. Calculating the mean and standard deviation of each treatment group separately.
B. Calculating the difference in the responses for each experimental unit under both treatments, and then finding the mean and standard deviation of the differences.
C. Calculating the proportion of the sample that reacted better to treatment one than treatment two.
D. Calculating the difference in the proportion of the sample that reacted better to treatment one and the proportion of the sample that reacted better to treatment two.