An example would be comparing the mean number of annual training hours for women and for all employees. What does median mean? The middle numbers are 7 and 13. Now if I took the mean you'll see that the last two months skew the data quite badly. Thus, the median is the central value that splits the dataset into halves. They have a wide range of real world applications such as in sewing, sales, and cooking. It is better to get the "half-way point" ( For example, for the data: 5, 7, 6, 127, you get a mean of 36.25 - an number that fits … In case of open ended class intervals, it cannot be calculated without assuming the size of the open end classes.