Statistical inference, that is, drawing conclusions about a population from a sample, is mainly done through
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → estimation and testing of hypotheses
In estimation, the information from a sample is used to give a value or a range of values (a confidence interval) for a population parameter.
In hypothesis testing, the sample is used to accept or reject a statement made about the population.
Collecting, tabulating, drawing graphs and finding averages only describe the data; by themselves they do not draw conclusions about the population.