Descriptive & Inferential Statistics

Summary

Descriptive statistics summarize a dataset (mean, variance, distribution shape); inferential statistics let you draw conclusions about a wider population from a sample — both used constantly in EDA and evaluation.

• 1Calculate mean, median, variance and standard deviation on a sample dataset by hand.
• 2Learn the difference between a population parameter and a sample statistic.
• 3Practice explaining why sample size affects how confident you can be in a conclusion.