Erin is researching how dog ownership impacts the health of older adults. She gathers health data from a group of older adults who don't own a dog and then measures their health again, 6 months after they adopted a dog from a shelter. What type of statistical analysis would be more appropriate for this study? Question 4 options: A z-test An independent sample t-test A repeated measures t-test Pearson's r A single sample t-test