Definition: Inferential statistics refers to the use of a series of mathematical methods to generalize the results obtained from sample data to the population where the sample is located.
Due to limitations in practical conditions, it may not be possible to examine each individual in the population one by one in actual research, only representative samples can be used to infer the overall situation of the population.
The key to conducting inferential statistics is to extract samples that are as close as possible to the population being studied, in order to minimize the sampling error.