This comprehensive guide covers the core Nigerian curriculum for Senior Secondary School 2 (SS2) Economics across all three terms. It breaks down the calculations, market theories, and macroeconomics you need to master the subject. Term 1: Economic Statistics & Demand/Supply ElasticityThe first term bridges mathematics and consumer market behavior. Measures of Central Tendency & Dispersion. You will learn to calculate averages and data spreads for grouped data:Arithmetic Mean (x̄): Calculated using \(\frac{\sum fx}{\sum f}\), where f is frequency and x is the class midpoint. Median: Found via \(L_1 + (\frac{\frac{N}{2} - CF}{f_m})c\), locating the exact middle value of data.Standard Deviation (σ): Measures data variance using \(\sqrt{\frac{\sum f(x-\={x})^{2}}{\sum f}}\).