Unit-I
Introduction:
Statistics as a subject; functions, importance and limitations of statistics; Planning and execution of a
statistical investigation; Census and sample investigation; Descriptive and inferential statistics.
Classification of data, Organisation of data using data array, Tabulation, Graphical Presentation,
Types of Diagram, Exploratory Data Analysis.
Unit- II
Measures of Central Tendency:
Definition and utility; Characteristics of a good average; Arithmetic Mean; Median; Other positional
measures - quartiles, deciles, percentiles; Mode; Relation between Mean, Median and Mode;
Geometric and Harmonic Mean; Choice of a suitable measure of central tendency.
Unit- III
Measures of Dispersion:
Meaning and objectives of Dispersion; different measures of Dispersion - Range, Quartile deviation,
Mean deviation, Mean Absolute Deviation, Standard Deviation; Comparison of the different
measures of dispersion. Measures of relative dispersion- Coefficient of Variation, combined mean
and standard deviation; moments, Skewness and Kurtosis; Moments; Coefficients based on
moments; Sheppard's correction; skewness; Measures of Skewness; Kurtosis and its measures.
Unit-IV
Correlation and Regression:
Correlation Analysis- Meaning of correlation; Karl Pearson's coefficient of linear correlation;
Properties of the correlation coefficient; Advantages and limitations of the coefficient of correlation;
Rank correlation; Spearman's Rank correlation coefficient. Regression Analysis - Two lines of
regression; some important results relating to regression lines; Correlation coefficient and the two
Regression Coefficients; Coefficient of Determination; concept of Multiple Regression.
Unit-V
Time Series Analysis:
Component, Trend analysis, Cyclical Variation, Seasonal Variation, Irregular Variation.

Index number:
Construction; Uses; Price Quantity and value indices, Consistency test of Index Number.