Question: According to the authors: "Retention from pretest to posttest was unrelated to gender, age, children's pretest depression scores, caretaker pretest depression scores, or children's pretest concept of death score. Attrition was highest
among African-American children: 5 of 8 African-American children dropped out compared to 1 White Anglo child and 2 Latino children (X²=10.06, df=2, p‹.006; 1 missing" (pp. 412-413).

(a) Describe in your own words what this passage means. (b) Why did the author use the X² statistic in this analysis? (c) What does the expression "X²=10.06" mean in this particular case, and what kind of calculation is it based on? (d) What does the expression "df = 2" mean in this particular case? (e) What does the expression "p<0.006" mean in this particular case?