A researcher is interested in the impact of two different types of protein bars on basketball players' hunger. The researcher pairs basketball players based on their weight and has one player in the pair eat one brand of protein bar (Brand A) and the matched player eat the other bar (Brand B). The researcher calculates the difference between each pairs' hunger (Brand A - B) and examines the mean differences across 15 pairs of players. What kind of t-test would be appropriate? Answer: A. One sample t-test B. Independent samples t-test C. Paired-samples t-test Is the test one-tailed positive, one-tailed negative, or two-tailed? Answer: A. one-tailed positive B. one-tailed negative C. two-tailed