Statistics: Means, Weighted Averages & Standard Deviation
This lesson is part of the course
In this lesson
You update an average when a value is added, combine two group averages, calculate a standard deviation and predict how it changes when every value is transformed.
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Lessons in this course
- Percentages & Successive Changes Locked
- Ratios, Mixtures & Alligation Locked
- Rates & Work: Combined Work, Pipes & Relative Speed Locked
- Simple & Compound Interest: The Trap Answers Locked
- Statistics: Means, Weighted Averages & Standard Deviation Locked
- Counting & Probability: Quick Problems Locked
- Number Properties: Remainders, GCD, LCM & Primes Locked
- Data Interpretation: Multi-Step Questions from a Table & Chart Locked