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# Density Curve of the Normal Distribution

## Locating a value by direction and number of steps from the mean

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.

## Density Curve of the Normal Distribution

This Concept expands upon the previous by discussing further the normal distribution and the probabilities associated with it by looking at the normal density curve.

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• Video

## Normal Distribution: P(more than x) where x is Less than the Mean

Given any problem with a standard deviation and mean, you can change them into z-scores to find the probability of getting a certain point within the distribution above or below it.

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## The z-Table

A table of probabilities based on z-score values. Includes an example that explains how to use the table.

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## Normal Demonstration

An interactive simulation of a normal distribution.

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## Normal Calculator

A calculator used to calculate the probability for a z-interval without a table.

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