PSY-520 Graduate Statistics

Topic 3 - Benchmark - Correlation and Regression Project

Directions: Use the following information to complete the questions below.

Use the following data points that have a linear relationship:

Substance Abuse and Suicide: Percent of the Total U.S. Population

X VARIABLE Y VARIABLE

Year Substance Use Suicide

1999 6.82 0.000105

2000 6.78 0.000104

2001 7.00 0.000107

2002 7.12 0.00011

2003 7.09 0.000108

2004 7.05 0.00011

2005 7.17 0.000109

2006 7.24 0.00011

2007 7.28 0.000113

2008 7.36 0.000116

2009 7.80 0.000118

2010 7.81 0.000121

2011 7.88 0.000123

2012 7.87 0.000125

2013 8.07 0.000126

2014 8.12 0.00013

2015 8.06 0.000133

2016 8.17 0.000134

2017 8.18 0.00014

2018 8.23 0.000142

4 In 300 words address the following: Identify the predictor variable and criterion variable. Describe the relationship between Substance Abuse and Suicides in terms of strength (weak/strong) and direction (positive/negative). Discuss whether you can make cause and effect statements when you get a significant correlation.