UNIT I Meaning and Scope of Statistics- Sources of data- Collection of data – Primary and Secondary – Methods of Primary data collection -Editing Secondary data - Classification and Tabulation – Presentation of data by Diagrams – Bar Diagram and Pie Diagram – Graphic representation – Frequency Distribution. UNIT II Averages – Simple and Weighted,Mean,Median,Mode,Geometric Mean and Harmonic Mean - computation – Properties and Uses,Standard Deviation and Coefficient of Variation. UNIT III Skewness-Meaning-Bowley’s and Pearson’s co-efficient of Skewness-Correlation- Meaning and Definition –Scatter diagram - Pearson’s Correlation Co-efficient- Computation and Interpretation - Rank Correlation – Regression - Meaning of Regression and Linear prediction - Regression in two variables -Uses of Regression. UNIT IV Interpolation – Newton, Lagrange and Binominal methods-Index numbers-Meaning – Uses-Methods of construction-Aggregative and Relative types- Tests of an Index number-Wholesale and Cost of living Index - Price data in India. UNIT V Time series – Meaning – Components-Models-Business Forecosting-Methods of Estimating trend - Graphic,Semi Average,Moving Average and Least Square Method- Seasonal Variation-Method of Simple Average- Interpretation of Statistics- Precautions- Errors – Methods of Sampling – Sampling and Non-Sampling Errors.