2. A diet's effectiveness is going to be tested by weighing 18 individuals of all different fitness levels before and after spending six weeks on the diet. The researchers want to know if a significant amount of weight will be lost in that time frame. What kind of hypothesis testing procedure would most likely be used with this kind of experimental design?
A) The dependent (matched pairs) t-test
B) The independent t-test using the Welch-Satterthwaite Approximation
C) The F-test to compare population variances
D) The independent t-test using the pooled variance estimate