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[DOCX File]Notes 7.2: Standard Normal Calculations
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Standardized Score (or Z-Score): Determines the number of standard deviations away from the mean for any value. z= (x- ̅ x ) st. dev. Positive z-scores are above average and negative z-scores are below average. Example 1: The number of questions correct on a test is normally distributed. The average was 42 with a standard deviation of 4.5.
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[DOC File]Lesson Title - VDOE
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Determine the z-score corresponding to 12.64, using the formula z-score = . Use the Standard Normal Probabilities Table to find the area associated with the z-score obtained in 3, and interpret your result. On the graph at right, label and shade the region that represents the likelihood a bag will contain between 12.1 and 12.76 oz.
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[DOC File]Z-Score Practice Worksheet
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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. A score of 90 on a test with a mean of 86 and a standard deviation of 18. A score of 18 on a test with a mean of 15 and a standard deviation of 5.
z score of 3.5

[DOC File]Quiz #1
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The z score of –5.48 = –1.24 (that is z = ). The size of the area under the curve below z = –1.24 is 0.1075 (from the normal curve table). The z score of –2.56 is 0.22 and the size of the area to the left of 0.22 is 0.5871. Finally, the shaded area in the figure above is 0.4796 = 0.5871 – 0.1075.
using a z score table

[DOC File]Exam 3 Practice Questions
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B Use the sampling distribution of the sample proportion that you used above and the z-score. Look up 1.00 in the table. 0.8413 is listed in the table. This is the proportion less than, we want the proportion greater than so we take 1-0.8413=0.1587.
normal z score table

[DOC File]CHAPTER 2 REVIEW
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What proportion of freshman biology majors have GPA above 3.50? ... Using the Normal Distribution Table, the z-score corresponding to the top 2.86% of the players is the z-score that has 1 – 0.02857 = 0.97143 area to the left of it. That z-score is approximately 1.9. Knowing this, we can calculate the actual batting average that is 1.9 ...
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[DOC File]Z-Score Practice Worksheet
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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]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 ...
z score higher than 4

[DOC File]Topic 6: Standard Scores
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For a +Z score, the table gives you Start here on 9/22/15. 1. The percentage of scores in the normal distribution below that +Z. 2. The percentage of scores between 0 (the mean) and that +Z. 3. The percentage of scores above that +Z, called the tail percentage. For a –Z score (a negative Z), the table …
how to read a z score table

Z score table above 3 5