4. A developmental psychologist wants to test the extent to which birth order predicts the amount of attention a child receives from his or her parents. The psychologist records the time, in minutes, those parents spend with their child during a 20-minute session. All children are the same age at the time of the test. The data for the 14 participants are below. Use an alpha of .05 to answer the questions below.

(a) Graph these data using a scatterplot. What does the scatterplot indicate about the relationship?

(b) What is the Pearson r & Spearman rho correlations between birth order and the amount of time parents spent attending to their child? Which correlation, Pearson or Spearman, would be most appropriate to use in this situation and why?

(c) What is the regression equation used to predict time spend attending to child from birth order?

(d) What is the coefficient of determination for this relationship? What does it mean?

(e) Emily is a first-born child, what is the predicted amount of time spent attending to her? If her parents actually spent 12 minutes attending to her, what is the error of prediction for Emily’s time?

(f) Give a write-up of the results as you would for a traditional APA-style journal article.