AP Test Prep
College Board

Why Variances Add - And Why It Matters

For Students 10th - 12th Standards
Why is adding variance important? A lesson outline defines a variance theorem and how it affects the data statistics. The instruction shows scholars the importance of considering the variance of data and why it requires independence.
Professional Doc
National Council of Teachers of Mathematics

Nctm: Standards for School Mathematics

For Students 9th - 10th
This standards-based NCTM website offers resources for teachers of mathematics for all grade levels, including interactive math tools, lesson plans, online resources, and the like.

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