Class 11 Statistics Notes

Collection of Data

Chapter 1: Collection of Data — understand the origin of statistics, types of data, and methods of data collection. GSEB Class 11 Statistics notes covering 5 topics: Origin and Growth of Statistics, Quantitative and Qualitative Data, Primary and Secondary Data, Methods of Collecting Primary Data, and Secondary Data Sources and Precautions.

Measure of Central Tendency

Chapter 3: Measure of Central Tendency — learn what an average really measures and master the arithmetic mean, median, mode, geometric mean and their combined forms. GSEB Class 11 Statistics notes covering 7 topics: Meaning and Importance, Arithmetic Mean, Combined and Weighted Mean, Geometric Mean, Median Quartiles Deciles and Percentiles, Mode, and Comparative Study of Mean Median and Mode.

Measure of Dispersion

Chapter 4: Measure of Dispersion — understand why the same average can hide completely different spreads, and master range, quartile deviation, mean deviation, standard deviation and coefficient of variation. GSEB Class 11 Statistics notes covering 8 topics: Meaning of Dispersion, Absolute and Relative Measures, Range, Quartile Deviation, Mean Deviation, Standard Deviation, Coefficient of Variation, and Combined Standard Deviation.

Skewness of Frequency Distribution

Chapter 5: Skewness of Frequency Distribution — read the shape of a frequency curve and measure how far it departs from symmetry. GSEB Class 11 Statistics notes covering 6 topics: Meaning of Skewness, Types of Skewness, Absolute and Relative Measures, Karl Pearson's Method, Bowley's Method, and Comparison of Methods.