7th Class Mathematics Data Handling Histogram


Category : 7th Class

*     Histogram


It.is a graphical representation of frequency distribution in which class-intervals are taken along x - axis and frequency are taken along y - axis.  


*      Frequency Polygon

The curve obtained by joining midpoints of successive tops of the rectangles of a histogram represents frequency polygon.        




  • Data is defined as the particular information in numeric form.
  • Mean \[=\frac{sum\,of\,observation}{Total\,number\,of\,observation}\] 
  • If the number of observations is odd then median \[={{\left( \frac{n+1}{2} \right)}^{th}}\] observation
  • If the number of observations is even Median \[=\frac{{{\left( \frac{n}{2} \right)}^{th}}observation+{{\left( \frac{n}{2}+1 \right)}^{th}}observation}{2}\]
  • Mode is defined as the value of variable which has highest frequency.      





  • Stat-etymology was the early applications of statistical thinking revolved around the needs of states to base policy on demographic and economic data.
  • Statistics help in prediction and forecasting using data and statistical models
  • There are four main levels of measurement used in statistics: ratio, interval, nominal and ordinal.  

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