Ever heard of data following a normal distribution? How do you know if you're data follows normal distribution? This tutorial introduces normal distribution and shows you the characteristics of a normal distribution curve!
Use statistics appropriate to the shape of the data distribution to compare center (median, mean) and spread (interquartile range, standard deviation) of two or more different data sets.
When you think of the mean of a data set, think of the word average. 'Mean' and 'average' are the same thing when you're talking about a set of data! This tutorial introduces you to mean and shows you how to find it!