A histogram allows you to visualize the number of data points in a particular range (like a bucket or bin).

You can also plot the histogram and see the ‘moments’ of the distribution very easily, the first and second moments being the mean, and standard deviation respectively.

This can be seen here, where the mean, median, and mode symmetric for a ‘Gaussian’ or ‘Normal’ distribution, which is balaneced on the left and right tails of the histogram, and are different when there is some ‘skew’ (the third moment of the distribution).

 

DDPic1    DDPic2

 

 

Why data science is important:

http://www-01.ibm.com/software/data/infosphere/data-scientist/

http://blog.alexa.com/know-data-science-important/

http://blogs.wsj.com/cio/2014/05/02/why-do-we-need-data-science-when-weve-had-statistics-for-centuries/

http://gigaom.com/2013/01/06/why-data-scientists-matter-data-science-is-the-future-of-everything/

 

References:

http://statistics-made-easy.com/relationship-between-the-mean-median-and-mode/

http://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-data-statistics/histograms/v/histograms-intro