Correlations

Correlations

1. Bivariate Regression

   • Predictions
   • Linear Equation
     • Line of Best Fit
     • Y = a + bX
     • b = Slope
     • a = Y-intercept/constant

2. Factors That Affect Correlation

   • Range Restrictions
   • Heterogenous Sample
   • Unequal Split of Responses
   • Outliers

3. Pearson's Correlation Coefficient/Bivariate Correlation

   • Relationship
     • Direction
       • Positive
       • Negative
     • Form
       • Linear
       • Non-Linear
     • Association/Degree
       • Negative
       • Positive
       • Magnitude
         • Small Effect
         • Moderate Effect
         • Large Effect
   • Output
     • r
     • p-Value
   • Scatterplots
   • Cohen's Cut-Off
   • Significance t-Test

4. Coefficient of Determination

   • r2
   • 1 - r2 = Error Variability
   • Shared Variance

5. Assumption of General Linear Model (GLM)

   • Normality
     • Bell Curve
     • Skewness
     • Kurtosis
   • Linearity
     • Linear
     • Non-Linear
       • J-Curve
       • U-Shape
   • Homogeneity of Variance
   • Kolmogorov-Smirnov Test

6. Data Transformation