कक्षा ९ को Presentation of Data अन्तर्गत रहेका Frequency table, Cumulative frequency, Histogram, Less than and More than frequency distribution ogive सरल तरीकाले सिकै र अभ्यास गराैं।

This file is a complete, self-contained interactive educational web application named StatsLab Pro, designed to teach students how to construct and analyze continuous frequency distributions, histograms, and ogives from raw data.