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[DOC File]Interpreting Means & Variance
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Z-scores-- These allow us to compare data values from different samples or populations.-- The z-score of any observation is found by subtracting the mean, and then dividing by the standard deviation. ... Interpreting boxplots. A long “box” indicates large variability in the data set.
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[DOC File]Numerical Measures of Central Tendency
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Jan 09, 2013 · The asterisk reminds us it isn’t calculated from the data like other z-scores. Alternate Example: Find the critical value for a 96% confidence interval for a proportion. What is the formula for a one-sample z interval for a proportion? Is this formula on the formula sheet? Discuss how the three parts of the formula correspond to the three ...
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[DOC File]Z-Score Practice Worksheet
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z=2. A score that is 10 points below the mean. z=-1. A score that is 15 points above the mean z=1.5. A score that is 30 points below the mean. z=-3. The Welcher Adult Intelligence Test Scale is composed of a number of subtests. On one subtest, the raw scores have a mean of 35 and a standard deviation of 6. Assuming these raw scores form a ...
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[DOC File]STA 2122 - Florida International University
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Calculate the z-score for each salary, z-score = x- μ σ, and complete that column of the table. Find which team’s quarterback has a salary farthest from the mean. What was the corresponding z-score? Find which team’s quarterback has a salary closest to the mean.
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How to Interpret Z-Scores (With Examples)
Interpreting z-scores: A z-score tells us how many standard deviations above/below the mean a data point is. Every time you obtain a z-score, interpret it. Use “above” or “below” in your phrasing. 1) The yields of apples trees in an orchard are normally distributed as …
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[DOCX File]Describing and Interpreting Data - UH
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The most important of these is the concept of the z score. A z - score (or standardized value) is the number of standard deviations that a given value x is above or below the mean. All data values can be expressed as a z-score, it is just another scale available to us.
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[DOCX File]mrbuda.weebly.com
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3.4: Z-Score. A normal distribution of scores has a standard deviation of 10. Find the z-scores corresponding to each of the following values: A score of 60, where the mean score of the sample data values is 40. A score that is 30 points below the mean. A score of 80, where the mean score of the sample data values is 30.
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[DOC File]Z-Score Practice Worksheet
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The Z-score is the number of standard deviations a data value is from the mean. If a data point has a z score that is less than -3 or greater than +3, it is considered to be an extreme value. Where:
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[DOCX File]Mathematics Instructional Plan - AFDA
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Interpreting Center & Variability. Density Curves: z-scores: What do these z-scores mean? z = -2.3 (z = 1.8 (z = 6.1 (z = -4.3 (Jonathan wants to work at Utopia Landfill. He must take a test to see if he is qualified for the job. The test has a normal distribution with μ = 45 and σ = 3.6. In order to qualify for the job, a person can not ...
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Interpreting z scores