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[DOC File]Exam0 - UH
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4, 4: (7+6+2)/3=5 1/1=1 4/5=0.8. How to interpret the results? [2.5 point] Cluster 2 is good; Cluster1 is not that good; its average silhouette is only 0.2; this is mainly caused by assigning the point (2,3) to the first cluster, although it is closer to the second cluster: this pathological assignment is indicated by the negative value of -2/3 ...
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[DOC File]Z-Score Practice Worksheet
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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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Wayne’s standardized score (z-score) on the ACT was -0.7. What was Wayne’s actual ACT score? 4.2 b) -4.2 c) 13.8 d) 17.3 e) 22.2. 8. Men’s Heights. The distribution of heights of adult American men is approximately Normal with mean 69 inches and standard deviation 2.5 inches. Use the Empirical Rule to answer the following questions.
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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. Z=2. A score that is 30 points below the mean. z=-3. A score of 80, where the mean score of the sample data values is 30. Z=5. A score of 20, where the mean score of the sample data values is 50. Z=-3. IQ scores have a mean of 100 and a standard deviation of 16.
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[DOC File]Z-Score Practice Worksheet
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Z-Score Practice Worksheet Name _____ A normal distribution of scores has a standard deviation of 10. Find the z-scores corresponding to each of the following values: A score that is 20 points above the mean. z=2. A score that is 10 points below the mean. z=-1 …
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[DOC File]Z-Score Practice Worksheet
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Oct 13, 2015 · Find the z score corresponding to a woman with a height of 70 inches and determine whether the height is unusual. 4. Three students take equivalent stress tests. Which is the highest relative score (meaning which has the largest z score value)? A score of 144 on a test with a mean of 128 and a standard deviation of 34..
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[DOC File]Topic 6: Standard Scores
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2. Find the Z score by looking up the percentile rank in Table 1. 3. Convert the Z score of 1.65 into an X, using Corty’s Equation 4.2 (X = µ + (Z * σ) (p105) X = 100 + (1.65*15) = 124.75 or 125 since IQ scores are reported to the nearest whole number. Extreme percentages exercise on p. 123
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[DOC File]6A: Characterizing a Data Distribution
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According to Table 6.3, a z-score of 2.2 is at the 98.6th percentile. So 1.4% of the 1,000,000 Martians, i.e. 14,000 Martians, score over 140. Venusians: Mean = 95, standard deviation = 16 IQ pts. 140 = 45 pts above the mean = 45/16 s.d.’s above the mean = z-score of 45/16 = 2.8125. According to Table 6.3, a z-score of 2.8 is at the 99.7th ...
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[DOC File]PART I I
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Compute the z-score corresponding to each of the following values of x; a. x = 40, s = 5, (x = 30. b. x = 90, µ = 89, ( = 2. c. ( = 50, ( = 5, x = 50. d. s = 4, x = 20, (x = 30. e. In parts . a-d, state whether the z-score locates x within a sample or within a . population. f. In parts . a-d, state whether each value of x lies above or below ...
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[DOC File]Topic 6: Standard Scores
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A. The Z-score. Generic Form: Z = (X – Mean) / SD or . There is a . population. version. Z = (X - µ) / σ or . And there is a . sample. version. Z = (X – X-bar) / SN-1 or. Interpretation of the Z score. Z tells us . how many standard deviations X is above or below the mean. Selected Z’s Interpretation +3 X is 3 SDs above the mean +2 X is ...
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Z score of 4