Z score and probability calculator
[DOCX File]www.houston.k12.tn.us
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Converting Probability (or area) in a normal distribution to a z-score 2ndVars InvNorm(a, µ, σ) For example: Fine the z-score that corresponds to a cumulative area of .3632InvNorm(.3632,0,1) = -.3499
[DOC File]Z-Score Practice Worksheet
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A score that is 20 points above the mean. 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.
[DOC File]Andrew Boutros
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To find the approximate probability of the test score from the example above, the z-scores need to be looked up on Table A or using the calculator. Example using Table A: What proportion of all young women are greater than 68 inches tall, given that the distribution of heights for all …
[DOC File]Z-Score Practice Worksheet
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For the numbers below, find the area between the mean and the z-score: z = 1.17 .38. z = -1.37 .41. For the z-scores below, find the percentile rank (percent of individuals scoring below):-0.47 31.9 Percentile. 2.24 98.8 Percentile. For the numbers below, find the percent of cases falling above the z-score…
[DOC File]Topic 15:
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Recall from Topic 5 the idea of standardization to produce a z-score, which indicated a value’s relative position in the data set. Find the z-score for the value 8.5 in the distribution of placement exams with = 10.221 and = 3.859. Find the z-score for the value 23.5 in the distribution of the number of girl births = 25.060 and = 3.472.
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