When most people hear the word “statistics,” they picture endless spreadsheets, complex equations, and anxiety-inducing math tests. But at its core, statistics is not really about math. Statistics is the science of learning from data. We live in a chaotic,…
We rely on the average (mean) to summarise data because it is incredibly convenient to represent a whole group with just one number. But averages have a dark secret: they frequently lie by omission. Imagine two students, John and Arun.…
If you just finished learning about Variance and Standard Deviation, you might have a lingering, frustrating question in the back of your mind. When we calculate how far our data spreads out from the average, we run into a problem:…
Nonlinear regression is a powerful statistical technique used when the relationship between your dependent and independent variables isn’t a straight line. While linear models assume a constant rate of change, nonlinear models allow you to map out accelerating growth, diminishing…
Imagine you go to the doctor for a routine checkup. The doctor decides to test you for a rare disease that affects 1 in 1,000 people. A few days later, the doctor calls you with terrible news: You tested positive.…
If you want to prove that Variable A causes Variable B, you cannot simply observe the world. The real world is too messy, filled with hidden factors and overlapping correlations. To prove causation, you have to build a controlled environment.…
Before you can run a hypothesis test, you have to choose your weapon. If you ask a social scientist, a data scientist, and an accountant what software you should use, you will get three violently different answers. The truth is,…
If you roll a die 10,000 times, plot the results on a graph, and squint, you will see a shape. If you measure the heights of 10,000 adult men and plot them, you will see a completely different shape. In…
It sounds like a terrible throat disease. It is 16 letters long, impossible to spell on the first try, and guarantees that half of any statistics class will tune out the moment the professor writes it on the whiteboard. But…
If you are cooking a massive pot of soup and want to know if it needs more salt, you don’t have to drink the entire pot. You just need to stir it well, take out a single spoonful, and taste…