RESEARCH STUDY 8.1

RESEARCH STUDY 8.1
Dr. Farah is an educational psychologist who is interested in studying the link between homework and academic achievement. Over the years, several researchers have found a link between the two, suggesting that doing homework is associated with higher grades. However, Dr. Farah is curious about the possible causal link between the two variables. She conducts the following study. At the beginning of the spring semester, Dr. Farah measures the number of hours her students spend doing homework during the preceding week and their fall GPA (a measure of academic achievement) . At the end of the semester, Dr. Farah measures the same variables again (the hours spent doing homework the preceding week and their spring GPA) . She finds the following correlations.

-Refer to Research Study 8.1 above to answer the following question. Based on her pattern of correlations,which of the following can Dr.Farah safely conclude?

A) Because Correlation C is significant but Correlation E is not, Dr. Farah has evidence that increased homework comes before academic achievement.
B) Because not all the correlations are significant, Dr. Farah has no evidence that increased homework comes before academic achievement.
C) Because all the correlations are significant, Dr. Farah has evidence that increased homework comes before academic achievement.
D) Because Correlations A and B are significant, Dr. Farah has evidence that increased homework comes before academic achievement.
E) Because Correlation D is stronger than Correlation F, Dr. Farah has no evidence that increased homework comes before academic achievement.