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[DOC File]Z-scores and Empirical Rule Notes
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Because the questions asks for the percentage, you must use your z-table. In. order to use your z-table, you must convert your throw values to z-scores. when rounded when rounded. Next find both of these z-scores on the z-table: 0.2389 and 0.5910. To find the percentage between. two numbers you subtract the lower from the higher:
using a z score table

[DOC File]Kenwood Academy
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Aug 27, 2013 · Finding z-scores from proportions . Use Table A to find the value z of a standard Normal variable that satisfies each of the following conditions. In each case, sketch a standard Normal curve with your value of z marked on the axis. (a) The point z with 70% of the observations falling below it.
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[DOC File]Z-Score Practice Worksheet - Ms. Shultis
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Scores on the SAT form a normal distribution with and . What is the minimum score necessary to be in the top 15% of the SAT distribution? Find the range of values that defines the middle 80% of the distribution of SAT scores (372 and 628). Find the z-scores. For a normal distribution, find the z-score that separates the distribution as follows:
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[DOC File]Z-Score Practice Worksheet
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If the standard deviation is 70 wpm, find the z-scores associated with each of the following reading speeds. a) 320 wpm b) 475 wpm c) 610 wpm. 4. SAT vs. ACT. Eleanor scores 680 on the SAT mathematics test. The distribution of SAT scores is symmetric and single peaked, with a mean of 500 and standard deviation of 100.
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[DOC File]Topic 6: Standard Scores
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Use Table 1 to find the Z scores corresponding to the tail areas. 3. Answer: The Zs that identify the extreme 5 percent of the normal distribution are -1.96 and + 1.96. Corty’s worked out examples, p 121. Clayton takes an IQ test which has mean = 100 and standard deviation = 15. He does better than 95% of the population, i.e., his percentile ...
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[DOCX File]Z-Scores Worksheet
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Quiz on z-Scores and Probabilities. The following scores were obtained as part of a sample with mean 10 and standard deviation 2. For each score, find the appropriate z-score: X = 14: z = X = 8: z = Use the table in the appendix, page 592 of the book, to find the given probabilities. Note: the numbers in . the table . might. not give you . the ...
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[DOC File]Worksheet on Normal Distribution - Washington-Liberty
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Normal Distribution and Table A Questions (z-scores as well) – NO EMPIRICAL RULE!!! For each question, construct a normal distribution curve and label the horizontal axis. Then answer each question. 4. A line for tickets to a local concert had an average (mean) waiting time of 20 minutes with a standard deviation of 4 minutes. If 2000 ticket ...
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[DOC File]Z-Score Practice Worksheet
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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. Assuming these raw scores form a ...
z probability table

Table a z scores