Taking an example from Wikipedias histogram article you might see something the following histogram and you might guess a mean around 25 between the fifth and sixth bins which has most of the data to the left but counterbalanced by the more extreme values to the right. The total number of observations in all bars below the median bar f is the frequency of the median bar and c is the median bar width. In a normal distribution points on one side of the average AVERAGE Function Calculate Average in Excel.
If the histogram is skewed right the mean is greater than the median.
A small area far away from the average can balance a large area close to the average because areas are weighted by their distance from the balance point. However this information is very useful when we need a trend filter. In order to draw a histogram to represent this data we need to find the frequency density for each group. It gets calculated like this.