You are a researcher for Chapman University and you saw the previous report indicating that bringing puppies to school during finals week did not significantly affect happiness. You believe that there are other things besides happiness that may be important during finals week, namely stress. To examine this, you gather data from 100 more students and assess their stress before and after playing with the puppies. Lower scores mean lower stress. a. Check to see that you have met the assumption to conduct a dependent samples t-test to determine if there are significant changes in stress pre- and post-playing with the puppies. Have you met the assumption of equal variances and normality of the difference between scores?

q1 8>8 levene test (score~group) q1 8>8 pivot wider (values from = "score", names from = "group") :> mutate (diff = post stress-pre stress) :>8 shapiro test (diff)