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This book is the collection of notes of Quantitative Techniques on following topics. Correlation Analysis: Meaning, Types and utility. Degree of Correlation, Karl Pearson Coefficient of Correlation, Spearman's rank Correlation. Regression Analysis; Meaning , Types and Utility, Comparison between correlation and regression, two lines of regression, regression line y on x and regression line x on y , Properties of regression lines. Relation between correlation and regression coefficients. Time Series: Meaning definition and utility, component of time series, secular trend, cyclical variations, Irregular variation, analysis or decomposition of time series, Method of measuring trends, measurement of seasonal variation.