Learning Objectives

  • Describe the difference between a positive and a negative relationship between two continuous (interval/ratio) level variables.
     
  • Conduct and interpret a scatterplot between two continuous (interval/ratio) level variables.
     
  • Calculate and interpret the correlation coefficient and the coefficient of determination.
     
  • Describe how the ordinary least-squares (OLS) regression equation is different from the correlation coefficient and why they are both useful.
     
  • Calculate and interpret the OLS regression equation, and interpret the intercept and slope coefficient.
     
  • Explain how to use the OLS regression equation for prediction.
     
  • Conduct and interpret null hypothesis tests for both the correlation and slope coefficients.