Histogram with unequal width Calculate Frequency Density

Описание: Related Example:    • Stem and Leaf Plot with Calculation of Ran...  
#LeafPlot #stemandleafplot #anilkumar #globalmathinstitute #statistics_gcse #datamanagement_ibsl
Quartile Interquartile range, semi-quartile range, outliers and data analysis from the box-and-whisker plots:    • How to Find Quartiles and Inter-Quartile R...  
   / @mathematicstutor  
Learn from Anil Kumar: [email protected]
Stem-and-leaf plot is an excellent method to organize the data as it is being collected. Data element is divided in two parts where the unit place value comes in the leaf and the rest is organized in the corresponding stem. It looks like a horizontal bar graph with all the values from where it is very easy to analyze the data.
Q1. How many variables do they represent?
Q2. What is represented on their x-axis?
Q3. What is represented on the y-axis?
Q4. How to find frequency from these graphs?
Q5. Why unequal bars can be used for histogram?
Display the following data and highlight key features of histogram.
% Marks [0, 30) [30, 50) [50, 60) [60, 70) [70, 100)
Frequency 12 12 14 20 9