The Idea of Statistical Inference: Making Sense of Numbers..

The complete game of Stats is to make a guess on Sample and make Predictions or Inferences about Population.

Population & Sample

Its all about choosing the unbiased or best sample or small slice or chunk from population which best describes or the best representative of my whole population.

Population : The Population is the Entire group that we are taking for analysis or prediction.

For instance, a population might be the set of:

• All students at a university
• All the cell phones ever manufactured by a company
• All the forests on Earth

Sample : Sample is the Subset of the Population (i.e. Taking random samples from the population). The size of the sample is always less than the total size of the population.

A sample is a subset of a population.

Samples drawn from the above populations might be:

• The math majors at the university