Presentation of data, diagrammatic and graphical presentation. One dimensional diagram, two dimensional diagram, three dimensional diagram, pie diagrams, histogram - frequency polygon, frequency curve-ogive.

Measure of central tendency - meaning, objective, requisites, various methods of measure of central tendency - mean, median and mode. Calculation of mean, median and mode in individual, discrete and continuous series. Calculation of quartiles, deciles and percentiles hi individual, discrete and continuous series.

Measure of dispersion - Meaning, requisites, various methods of dispersion - range, inter quartile range, quartile deviation, mean deviation, standard deviation, coefficient deviation.

Correlation - meaning, types of correlation, Scatter diagram, Karl Pearson's coefficient of correlation (ungrouped data only), Spearman's rank correlation, Coefficient (ungrouped data only).

Regression - Linear regression - lines of regression - estimation using limes of regression (using deviation for mean) (ungrouped data only).

Sampling technique - Random sampling - stratified sampling, systematic sampling, quota sampling, cluster sampling, laws of statistical regularity, inertia of large numbers, errors in sampling.