So what standard deviation can tell about an interval of data? Simple. It tells you how sparse the values of your variable are from the mean. For example lets take an interval X = {1,2,3,4,5,6,7} it yields

Statistical modeling is about applying statistics on data to find the underlying relationships by analyzing the significance of the variables. It is the formalization of relationships between the variables

Here is how I used simple statistics for solving my problem. It is now two years that I’m a commuter going back and forth from Bologna to Reggio Emilia in Italy. I use the train for my travel as a commuter