As data scientists we often need to estimate a value from a sample data set in order to answer a business question about the whole population. In most cases we get a sample data set, and we wish to estimate the mean of some value and so the sample mean is a good choice for an estimator.

You have just completed setting up your new and shiny EMR cluster, and want to unleash the full power of Spark on the nearest data-source.

Whenever you need to slice and dice a massive dataset, and pandas or SQL just can’t do the trick - pam pam pam, have no fear Spark is here.