• Correlation
• Strength (-1.0 to 0 to +1.0)
• Direction
  • Positive Relationship
  • Negative Relationship
• Scatterplot
• Pearson's Product Moment Correlation Coefficient (r)
• Coefficient of Determination (r2)
• Causality
  • Relationship
  • Cause First
  • No other Factors
• Limitations
  • Non-linear Relationship
  • Homogeneous Groups
  • Measurement Floor or Ceiling
  • Unreliable Measure
• Excel
• Statistical Significance (alpha) (p)
• Critical Value
• Measurement Scales
  • Nominal
  • Ordinal
  • Interval
  • Ratio