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[DOC File]CHAPTER 2 REVIEW
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ANS: Since you want to know what the top 10% of scores would look like, the area to the left would be 0.90. That is, a z-score of z = 1.285. giving x = 708. (or invNorm (0.9, 580, 100) ) A student would have to score 708 or higher to be in the top 10% of the student body. 12. The grading at Central High gives a B for grades between 86 and 93.
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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]Sample Test Questions -- Test 1 - University of Florida
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17. You find old research on this species of whales that only reports the z-scores of lengths and not the actual lengths of whales. One particular whale stands out to you because it has a z-score of 5.2. What does the z-score tell you? a) This whales is much larger …
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[DOC File]6A: Characterizing a Data Distribution
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3 st.dev. below mean ( z-score = –3. The nth percentile of a data set is the smallest value in the set with the property that n% of the data values are less than or equal to it. (Examples: The 50th percentile = the median. The 25th percentile = the first (or lower) quartile.
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[DOC File]5 college.edu
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Step 3: Use table 5 to find the z-score. (Go backwards! From the main body of the table to the z-score) Step 4 Find the score, x, by using the formula (score = mean + z-score * standard deviation) Using the TI-83/84 to obtain normal scores, percentiles. Press 2nd, VARS. Select 3:invNorm(Type total area to the left of the desired value ...
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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]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]Stats - Dearborn Public Schools
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Feb 05, 2020 · If we know the z-score and need to work backwards to find the x-value, we can transform that formula and solve it for x. Example 3: The speeds of vehicles along a stretch of highway are normally distributed, with a mean speed of 67 mph and a standard deviation of 4 mph. Find the speeds x corresponding to z-scores of 1.96, -2.33, and 0.
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[DOC File]Lecture 6 – Z scores
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Thus, a z-score of 1.5 is 1 ½ sd above the mean, and a z-score of –2 is 2 sd below the mean. sample z: population z: Examples: Suppose you took 3 midterm examinations in Math, English, and Biology, and you want to compare your scores: Math English Biology your score 90 85 93 Mean 85 82 94 Standard deviation 5 2 1 z-score 1.
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Z score of 3 5