Data Science Classroom Series – 29/Oct/2021

Covariance

  • Covariance is a statistical tool i.e. used to determine the relationship between movement of two variables.
  • formula Preview
  • Formuala Usage: Preview

Correlation

  • Correlation coeffecient are indicators of strength of linear relationship between two different variables x and y.
  • A linear correlation coeffecient has the values in the range of -1.0 to 1.0
    • -1.0 is referred as perfect negative correlation
    • 1.0 is referred as perfect positive correlation
    • 0 indicates there is no relation between variables (independent variable)
  • Formula: Preview Preview
  • Refer Here for the xlsx file Preview
  • Exercise:
    • Calculate covariance and correlation between two variables reading and writing scores of SAT Preview

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