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[DOC File]Standard Deviation
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One standard deviation away from the mean in either direction on the horizontal axis (the red area on the above graph) accounts for somewhere around 68 percent of the people in this group. Two standard deviations away from the mean (the red and green areas) account for roughly 95 percent of the people.
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[DOC File]Z-Score Practice Worksheet
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A score of 60, where the mean score of the sample data values is 40. A score that is 30 points below the mean 40. A score of 80, where the mean score of the sample data values is 30. A score of 20, where the mean score of the sample data values is 50. IQ scores have a mean of 100 and a standard deviation …
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[DOC File]The Practice of Statistics - AP STATISTICS - AP Statistics
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Explain how the mean and the standard deviation are related to the Normal curve. Define Normal distribution and Normal curve. What is the abbreviation for a Normal distribution with a mean ( and a standard deviation (? Explain the 68-95-99.7 Rule. When does this rule apply? Answer questions 1-3 for the Check Your Understanding on page 114.
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[DOC File]AP Stats Reading Guide
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measures of position (such as the mean, median, and percentiles) and. measures of spread (such as the range, the IQR, and the standard. deviation) are multiplied (or divided) by that same constant. Do the “Just Checking” on page 110. Back to Z-Scores. Z-scores have a mean of 0 and a standard deviation …
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[DOCX File]ww2.justanswer.com
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Mar 29, 2010 · The important measures of dispersion are the range, the standard deviation, the mean deviation, and the standard deviation. The most popular measure of dispersion is the standard deviation. Sample standard deviation measures the dispersion or spread of the observations from the central value of the sample.
standard deviation explained simply

How to explain mean and standard deviation