2. first quartile (Q1)
4. third quartile (Q3)
Below is the detail of the above parameters:
median (Q2/50th Percentile): the middle value of the dataset.
first quartile (Q1/25th Percentile): the middle number between the smallest number (not the “minimum”) and the median of the dataset.
third quartile (Q3/75th Percentile): the middle value between the median and the highest value (not the “maximum”) of the dataset.
interquartile range (IQR): 25th to the 75th percentile.
whiskers (shown in blue)
outliers (shown as green circles)
maximum: Q3 + 1.5*IQR
minimum: Q1 -1.5*IQR
Advantages of Barplots
1. Used to find out skewness of variables.
2. Used to find out outliers in a variable.
3. Used to find out if the data is symmetrical or not? How tightly the data is grouped?