What do z scores mean
[DOCX File]Mathematics Instructional Plan - AFDA
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Students will need to use a graphing utility or spreadsheet software to compute z-scores, mean, and standard deviation. After students complete the z-score chart, discuss percentages between the standard deviation ranges before having students complete questions 6 through 10 on the activity sheet.
[DOCX File]2A.11b Just In Time Quick Check - Virginia Department of ...
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the numerator when using the z-score formula to solve for the value of the mean, resulting in a mean value that is larger than accurate. This may indicate that students do not recognize the meaning of the variables represented in the z-score formula.
[DOC File]Z-Score Practice Worksheet
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A score that is 20 points above the mean. 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.
[DOC File]Z-Score Practice Worksheet
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How would you interpret each of the following z-scores? 2.2 b) -0.4 c) -1.8 d) 1.0 e) 0 . 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 40.
Summary of lesson
Mean, standard deviation, z-scores, and all of the inference techniques based on z-scores work best when data distributions are reasonably symmetric and mound-shaped. Real data frequently do not cooperate. Our goal is to transform (or re-express) univariate data values to address the problem of skewness. Move to page 1.3.
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