Danitz, Suvak, and Orsillo (2016) examined the association between change in acceptance, mindfulness practice, and academic values on other outcomes in a first-year undergraduate experience course that in tegrated an acceptance-based behavioral program. The researchers reported, 

An examination of correlation indicated that changes in acceptance were negatively associated with changes in depression, r = -.33 (n = 213), p < .001
a. What was the sample size in this study?
b. What was the value of the correlation coefficient? Was the correlation significant at a .05 level of significance? Explain.