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# Empirical Rule

## Three steps from the mean for 68-95-99.7 percentages

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.

## Empirical Rule

by CK-12 //basic

Use percentages associated with normal distributions to solve problems.

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## The Empirical Rule

by CK-12 //at grade

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## Empirical Rule

by Melissa Moreno //basic

Use percentages associated with normal distributions to solve problems.

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## The Empirical Rule

by Marion Van Hoose //

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• PLIX

## Empirical Rule

by CK-12 //at grade

Empirical Rule Interactive

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• Video

## Empirical Rule Principles

by CK-12 //basic

This video gives more detail about the mathematical principles presented in Empirical Rule.

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• Video

## Empirical Rule Examples

by CK-12 //basic

This video shows how to work step-by-step through one or more of the examples in Empirical Rule.

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• Video

## Normal Distributions and the Empirical Rule

by CK-12 //basic

Explains how to use the empirical rule, also known as the 68-95-99.7 rule, to calculate certain normal distribution probabilities. That's right! You don't always need a calculator!

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• Lesson Plan

## Calculating the Standard Deviation and Normal Distribution Lesson Plan

by CK-12 //basic

This lesson plan covers Calculating the Standard Deviation and Normal Distribution and includes Teaching Tips, Common Errors, Differentiated Instruction, Enrichment, and Problem Solving.

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## Empirical Rule Quiz

by CK-12 //at grade

10 questions about Empirical Rule.

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• Practice
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## Empirical Rule Practice

by CK-12 //at grade
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• Critical Thinking

## Empirical Rule Discussion Questions

by CK-12 //at grade

A list of student-submitted discussion questions for Empirical Rule.

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## Empirical Rule Post Read

by CK-12 //at grade

To organize ideas, increase comprehension, synthesize learning, demonstrate understanding of key concepts, and reinforce vocabulary using a Quickwrite.

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## Empirical Rule Pre Read

by CK-12 //at grade

To encourage students’ critical thinking about vocabulary concepts, to allow students to reflect on their knowledge of individual vocabulary words, and to increase vocabulary comprehension using the Vocabulary Self-Rate.

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• Real World Application

## Normal Distribution

by CK-12 //at grade

Students will investigate why and how the SAT is scored to correspond with a normal distribution curve.

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• Study Guide

## Normal Distribution Study Guide

by CK-12 //at grade

This study guide looks at characteristics of a normal distribution curve, the empirical rule, z-score, standardizing normal curve, and approximating binomial distribution.

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• Study Guide

## Area Under Density Curve of Normal Distribution

by Danielle Pintz //basic

covers normal density curves, the empirical rule, and z-scores

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• Study Guide

## Area Under Density Curve of Normal Distribution

by MAURICE ADAMS //basic

covers normal density curves, the empirical rule, and z-scores

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• Flashcards

## Normal Distribution Curves Flashcards

by CK-12 //at grade

These flashcards help you study important terms and vocabulary from Spread of a Normal Distribution, Variance of Normally Distributed Data, and Empirical Rule.

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