A group of researchers recruits 200 participants to engage in a 10-week weight-loss diet. The researchers weigh the participants at the beginning and end of the 10 weeks. To see whether the difference between the pre-diet mean weight and post-diet mean weight is statistically signficant, the researchers should use which of the following tests: Group of answer choices Matched pair t-test independent samples t-test One sample t-test Multiple Regression