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# Modeling data distributions

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Calculating percentileAnalyzing a cumulative relative frequency graphCumulative relative frequency graph problem

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Calculating percentilesGet 3 of 4 questions to level up!

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Normal distribution problem: z-scores (from ck12.org)Comparing with z-scoresZ-scores review

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Calculating z-scoresGet 3 of 4 questions to level up!

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How parameters change as data is shifted and scaledTransforming data problem

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Transforming dataGet 3 of 4 questions to level up!

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Density CurvesMedian, mean and skew from density curvesDensity curve worked exampleWorked example finding area under density curves

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Properties of density curvesGet 3 of 4 questions to level up!

Area under density curvesGet 3 of 4 questions to level up!

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Qualitative sense of normal distributions (from ck12.org)Normal distribution problems: Empirical rule (from ck12.org)Standard normal distribution and the empirical rule (from ck12.org)More empirical rule and z-score practice (from ck12.org)Normal distributions review

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Empirical ruleGet 3 of 4 questions to level up!

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Standard normal table for proportion belowStandard normal table for proportion aboveStandard normal table for proportion between valuesFinding z-score for a percentileThreshold for low percentileBasic normal calculations

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Normal distribution: Area above or below a pointGet 3 of 4 questions to level up!

Normal distribution: Area between two pointsGet 3 of 4 questions to level up!

Normal calculations in reverseGet 3 of 4 questions to level up!

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Deep definition of the normal distributionNormal distribution excel exercise