What is sampling?

We all know ‘Sample’ means a small part or quantity intended to show what the whole is like. Similarly, the ‘Random Sampling’ is a way of selecting a portion chosen from the population in order to make inferences about the whole population. For example, pre-polls or exit polls results obtained from random voters aims to…

What is regression analysis?

Regression analysis is a form of inferential statistics. It is a measure of the relation between the mean* value of one variable (e.g. output) and corresponding values of other variables (e.g. time and cost). Regression model can help predict sales for a company based on weather, previous sales, GDP growth or other types of conditions.…