A New Fiber Bar Is Advertised to Curb Hunger for Three

Multiple Choice

A new fiber bar is advertised to curb hunger for three hours. A sample of fourteen hungry subjects was asked to record their level of hunger before eating the fiber bar and again three hours after eating the fiber bar. Which of the following is a better method for testing whether there is a difference in the level of hunger three hours after eating the fiber bar (i.e. the fiber bar curbed hunger for three hours) ?

A) Data transformation and t-confidence interval of transformed data
B) Paired t-test
C) Sign Test
D) Mann-Whitney Test