PSYC 210.W01 Spring 2023 Chapter 11 Correlation Homework #5 1. A team of psychologists conducted a study of depression and anxiety using a sample of 12 depressed clients and obtained the following scores: Subject: 1 2 3 4 5 6 7 8 9 10 11 12 Depression: 46, 49, 41, 45, 47, 59, 58, 50, 54, 50, 46, 50 Anxiety: 41, 52, 46, 51, 53, 67, 49, 51, 62, 61, 42, 60 A) Construct a scatter diagram and describe the general pattern of the relationship. B) Calculate the correlation coefficient. C) Explain the procedure to someone who is unfamiliar with correlation but who does understand the mean, deviation scores, and variance. D) Describe the three possible directions of causality. 2. Four research participants take a test of manual dexterity (high scores mean better dexterity) and an anxiety test (high scores mean more anxiety). Person Dexterity Anxiety A 10 B 8 C 2 4 D 4 -2 A) Construct a scatter diagram and describe the general pattern of the relationship. B) Calculate the correlation coefficient. C) Explain the procedure to someone who is unfamiliar with correlation but who does understand the mean, deviation scores, and Z-scores. D) Describe the three possible directions of causality. 3. A team of psychologists conducted a study examining the number of credits and stress level during finals week using a sample of 5 college students. They obtained the following scores: Subject # of credits taking Stress level during finals week 12 6 18 10 UIAWN- 15 17 14 A) Construct a scatter diagram and describe the general pattern of the relationship. B) Calculate the correlation coefficient. C) Explain the procedure to someone who is unfamiliar with correlation but who does understand the mean, deviation scores, and Z-scores. D) Describe the three possible directions of causality