Download - Histogram
Histogram
Histogram
▪ A Histogram is a bar graph that shows the frequency of data within equal intervals.
▪ It was first introduced by Karl Pearson.• Histograms gives a graphical representation showing a
visual impression of the distribution of Data.• Each bar represents an interval that contains data.• The height of the bar indicates the frequency of the
data.
Why we use Histogram
▪ When there is a lot of data
▪ When data is ▪ Continuous ▪ a mass, height, volume, time etc
▪ Presented in a Grouped Frequency Distribution▪ usually in groups or classes that are UNEQUAL
Histogram
Histogram
Unequal Heights determined by Frequencies.
Advantages
Why we should use Histograms?The power of Histograms is that they allow as to analyze extremely large datasets by reducing the to a single graph that can show primary, secondary and tertiary peaks in data as well as give a visual representation of statistical significance of those peaks.
Cautions
While drawing, we should look out for some things-Sensible ScalesBases correctly aligned
Plot the Class BoundariesHeights correct
Frequency Density
Thank you