Mathematics
What is Statistics?
Statistics is the science of collecting, organizing, analyzing, and interpreting data to find patterns and make decisions under uncertainty. It turns raw numbers into meaningful conclusions.
See it, don’t just read it.
Watch a 2-minute lesson with voice + animation that explains statistics.
Key things to understand
- 1Descriptive statistics summarize data; inferential statistics draw conclusions about a larger group from a sample.
- 2The mean, median, and mode describe a typical value; standard deviation describes spread.
- 3Sampling lets us study a whole population from a smaller group.
- 4It underpins science, polling, medicine, business, and machine learning.
Frequently asked questions
- What's the difference between mean, median, and mode?
- Mean is the average, median is the middle value, and mode is the most frequent value.
- What's the difference between probability and statistics?
- Probability predicts outcomes from a known model; statistics infers the model from observed data.
- Why is sampling used?
- It's often impossible to measure everyone, so a representative sample estimates the whole population.