When we have to analyse some data, we have to know what are we looking for, the purpose of the study that allowed to recollect that data, in other words, we have to be specific to study the relation between variables.
Moreover, all data together is always hard to read as it is, because we will see just numbers that are apparently random. Here is tables and graphs take place, they are tools to help us to read all information recollected and study the relation between variables. Those tools will help us to arrange data with certain order, making easier the analyse we want to perform, that way we'll be able to find patterns among data towards the purpose of the study.
