Class 11 Economics - ODISHA
Correlation
The chapter 'Correlation' in Class 11 Economics for Odisha (BSE) students explores the statistical relationship between two variables. You will learn how to measure the direction and strength of association between economic factors, such as price and demand, or income and consumption. Understanding correlation is vital for analyzing economic trends and making data-backed predictions. This chapter carries significant weight in the board exams, frequently featuring both conceptual short-answer questions and numerical problems that test your ability to calculate and interpret correlation coefficients using different mathematical methods.
Start Learning FreeKey Concepts
Correlation
A statistical technique that measures and describes the degree of relationship between two or more variables.
Positive Correlation
A relationship where two variables move in the same direction; as one increases, the other also increases.
Negative Correlation
A relationship where two variables move in opposite directions; as one increases, the other decreases.
Karl Pearson's Coefficient of Correlation
A mathematical method that gives a precise numerical value (denoted by 'r') ranging from -1 to +1 to measure linear correlation.
Scatter Diagram
A graphic method of studying correlation where data points are plotted on a graph to visually represent the relationship between variables.
Important Formulas
Board Exam Info
In the Odisha (BSE) Class 11 Economics board examination, this chapter typically carries around 6 to 8 marks. Questions usually include 1-mark objective questions, 2-mark short notes on types of correlation, and a 4 or 6-mark numerical problem based on Karl Pearson's or Spearman's Rank correlation methods.
Frequently Asked Questions
Can correlation prove cause and effect?
No, correlation only shows that two variables move together, but it does not prove that one variable causes the change in the other.
What is the range of the correlation coefficient (r)?
The value of 'r' always lies between -1 and +1, inclusive.
What does a correlation coefficient of zero mean?
A value of zero indicates that there is no linear relationship or correlation between the two variables.
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