1. Read through the article, Interaction of Oxytocin Leven and Past Depression May Predict Postpartum Depressive Synnitoni Severity (Massey et a1, 2016), and answer the following questions. a. Name at least one source of sampling bias in this study and describe something specic that the study's authors did to try to minimize it. {2ptj b. Consider the distribution of the third trimester plasma oxytocin concentration levels across the entire study sample. Calculate the 95% confidence interval for its population mean. Given: t* = 2.000 (Spt) c. Suppose you used this sample to test if mean plasma oxytocin concentration in pregnant mother's during her third trimester differed from 825 pg/ml. Would you reject or fail to reject the null hypothesis? Explain your reasoning. (2P0