21. Stats You Need for Data Work
Chala mitrano, aaj aapan charts chya aadhi thodya stats — mean, median, mode, quartiles, skew, correlation. Model nahi. Blinkit Pune ops sathi numbers vachayla shiku. Ghabru naka, daily language madhe sangato.
What you will learn in this chapter
- Why a few stats beat a pretty chart alone
- Mean vs median vs mode on ₹ order values
- Min, max, quartiles and IQR in plain English
- Skew: Diwali spike vs a normal week
- Correlation vs causation (careful wording)
- Light sampling intuition (no ML jargon)
- A practice task you can run in Jupyter
Fictional data
Blinkit / Amazon Now figures in this chapter are fictional sample data for learning only. They do not show real company numbers. People names are for practice; e-mails use example.com.
Concepts in this chapter
- 21.1Why Stats Matter Before Charts
- 21.2Mean, Median and Mode with ₹ Orders
- 21.3Spread: Min, Max, Quartiles and IQR
- 21.4Distributions and Skew
- 21.5Correlation vs Causation
- 21.6Sampling Intuition (Keep It Light)
- 21.7Practice, Tip and Close
The chapter recap is at the end of the last concept page.