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Types of Statistical Methods: Descriptive & Inferential The study of statistics can be categorized into two main branches. These branches are descriptive statistics and inferential statistics. Descriptive statistics is used to sum up and graph the data for a category picked. This method helps to understand a particular collection of observations. A sample is defined on descriptive statistics. There is no confusion in concise numbers, since you just identify the individuals or things which are calculated. Descriptive statistics give information that describes the data in some manner. For example, suppose a pet shop sells cats, dogs, birds and fish. If 100 pets are sold, and 35 out of the 100 were dogs, then one description of the data on the pets sold would be that 35% were dogs. Inferential statistics are techniques that allow us to use certain samples to generalize the populations from which the samples were taken. Hence, it is crucial that the sample represents the population accurately. The method to get t