Z score of 4 6
[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 ...
[DOCX File]Ways to Measure Central Tendency
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Z-Scores. Calculation. Definition. Problem 1 - Test Scores. a) Suppose the mean score on a stats exam is 80 and the standard deviation is 6.07. Student 1 scored an 86, student 2 scored a 99 and student 3 scored a 72. Calculate the z-score for each student. b) Suppose the mean score on a chemistry test is 76 and the standard deviation is 4.
[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.
[DOC File]Z-Score Practice Worksheet
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Scores on the ACT college entrance exam follow a Normal distribution with a mean 18 and a standard deviation 6. 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
[DOCX File]Part A - University of Phoenix
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score a standard score? Why can standard scores be used to compare scores from different distributions? Why is it useful to compare different distributions? For the following set of scores, fill in the cells. The mean is 74.13 and the standard deviation is 9.98. Raw score: Z; score; 68.0?? –1.6…
[DOC File]6A: Characterizing a Data Distribution
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= z-score of 35/16 = 2.1875. 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 ...
[DOC File]Solutions to Z-score Worksheet
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Find a z score and the corresponding probability for 6 minutes..1%. d. What percentage of drivers waits between 2 and 4 minutes? Find the z scores and probabilities associated with these times. 71.76%. e. If a driver waits in the top 2%, how much time does he wait? Find a z score associated with the top 2% and solve for the time. seconds or ...
Percentiles and Z scores - Texas Instruments
Find the corresponding percentile and x-value for a sunflower that has a z-score of 1.6. 14. The shoe sizes of a men’s basketball team are normally distributed with a mean of 11.5 and a standard deviation of 1.25. Find the corresponding percentile and x-value for a player that has a z-score of –3.1.
[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.
[DOC File]NUTRITION SURVEYS
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Boloso Surie July 2000 Oxfam 901 30 clusters W/H
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