What is standard deviation 1
[DOC File]Z-Score Practice Worksheet
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A normal distribution of scores has a standard deviation of 10. Find the z-scores corresponding to each of the following values: 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 …
[DOC File]Z-Score Practice Worksheet
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2.2 b) -0.4 c) -1.8 d) 1.0 e) 0 . 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 40. A score of 80, where the mean score of the sample data values is 30.
[DOCX File]AP BIOLOGY--LAWNDALE HS - Home
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AP Biology Standard Deviation Practice worksheet. 1. The formula for the standard deviation, S(SD), is on the right: Identify what each of the following parts of the formula mean by explaining it in words. (a) n (b) x (c) ∑ (d) A name for the quantity n –1 is . 2. Consider the two figures. Each shows a distribution of data with a mean, x, of 5.
[DOC File]Mean, Median, Box & Whisker Plots
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Calculate the Standard Deviation. - 1 deviation = _____ =_____ + 1 deviation = _____ 50 55 60 65 70 75 . Which x values lie within one standard deviation of the mean?_____ A z-score is the number of standard deviations that a given x-value lies above or below the mean. z-score (z) = A student with the height of 72 inches has a z-score of ...
[DOC File]1
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If the standard deviation remains the same, what target mean should they have as a goal? The researches produce a new variety with a mean weight of 75 grams, which just meets the 4% goal. What is the standard deviation of these new Romas? Based on their standard deviations, compare the tomatoes produced by the two varieties.
[DOC File]Standard Deviation/Standard Score Correspondence
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Standard Deviation/Standard/Scaled Score Correspondence Standard Deviation (SD) Standard Score Scaled Score 2 SD above mean 130 or above 16 or above 1 SD above mean Between 115 and 130 Between 13 and 16 Within 1 SD of mean Between 85 and 115 Between 7 and 13 1 SD below mean Between 70 and 85 Between 4 and 7 1.5 SD below mean 77.5 5.5 2 SD below ...
[DOCX File]CALCULATING STANDARD DEVIATION WORKSHEET
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The smaller the standard deviation, the closer the scores are on average to the mean. When the standard deviation is large, the scores are more widely spread out on average from the mean. The standard deviation is calculated to find the average distance from the mean. Practice Problem #1: Calculate the standard deviation of the following test ...
[DOC File]Worksheet on Normal Distribution
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Use the 1.5IQR rule. 6. The Floppy Disk Company makes 3.5 inch floppy disks for disk drives that are 3.7 inches wide. The width of a manufactures disk is normally distributed with a standard deviation of 0.1 inches. The company manufactures 1000 disks every hour. a) 30% of the disks’ widths were less than how many inches?
[DOC File]Standard Error - Stanford University
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Standard Deviation of a Population (dealing with a population) This is the standard deviation of raw scores from a measure on which we have obtained a set of scores. Standard Deviation Estimate (with a sample, estimating the population) In fact, mostly, we don't know the information of the population, we use one sample to estimate the parameter ...
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