Main content
Course: Statistics and probability?>?Unit 4
Lesson 5: Normal distributions and the empirical rule- Qualitative sense of normal distributions
- Normal distribution problems: Empirical rule
- Standard normal distribution and the empirical rule (from ck12.org)
- More empirical rule and z-score practice (from ck12.org)
- Empirical rule
- Normal distributions review
? 2024 Khan AcademyTerms of usePrivacy PolicyCookie Notice
Empirical rule
You might need: Calculator
Problem
The lifespans of gorillas in a particular zoo are normally distributed. The average gorilla lives years; the standard deviation is years.
Use the empirical rule to estimate the probability of a gorilla living less than years.
Related content