Gujarat Board Class 12 Statistics — Chapter Summary

An Index Number is a statistical tool that measures the relative percentage change in the value of a variable (price, quantity, production, etc.) for a current period compared to a fixed base period. Rather than using absolute differences, index numbers use ratios (relative measures), making them un

Linear Correlation is the study of the relationship between two variables that change simultaneously. In real life, many variables are interdependent — rainfall and crop yield, income and expenditure, price and demand. This chapter introduces the concept of correlation, its types, methods of measure

Linear Regression is a powerful statistical tool that extends the concept of correlation by establishing a functional (mathematical) relationship between two correlated variables. While correlation tells us the strength and direction of a relationship, regression allows us to predict or estimate the