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[DOC File]Standard deviation - 物理系
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The standard deviation allows us to recognize that the average for the city with the wider variation, and thus a higher standard deviation, will not offer as reliable a prediction of temperature as the city with the smaller variation and lower standard deviation. 3.1.2 Sports. …
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[DOC File]CALCULATING STANDARD DEVIATION WORKSHEET
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Sep 26, 2015 · When the standard deviation is large, the scores are more widely spread on average from the mean. The . standard deviation. is calculated as the . average distance from the mean. Practice Problem #1: The junior high basketball team played ten games. Find the standard deviation for the number of baskets scored by the team for the ten games:
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[DOC File]University Of Maryland
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The actual standard deviation is a bit larger than the average deviation -- in this case 5 mm rather than 3.33. Below is a table of each brand, the average growth, and the standard deviation: Fish # 1 to 3 4 to 6 7 to 9 10 to 12 Brand BF BM FOM F2W !!
standard deviation formula

[DOC File]A sample mean, denoted (pronounced “x-bar”), is an average ...
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The formula is . A . sample standard deviation, denoted, is an average deviation of n observations. It measure the spread or dispersion of the observed data values. The formula is or for simplification . is called a deviation. is called a squared deviation. SSX is the Sum of Squared X deviations
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[DOC File]CALCULATION OF REPEATABILITY AND REPRODUCIBILITY
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Repeatability standard deviation r and reproducibility standard deviation R are defined as formula eq.2 and eq.3. (2) (3) ... (20) is the average of the estimated within laboratory variance of the labotratories. The expectation of sri2 is , (21)
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[DOC File]Calculating a Standard Deviation
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Technically, the variance is the average squared deviation of a data set, and the standard deviation is the square root of the variance. These are not descriptions most people easily understand. Calculating the variance and standard deviation piece-by-piece gives us a firmer grasp of what exactly the variance and standard deviation are.
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[DOC File]Mean— A mathematical average of a group of numbers
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Frequency counts can be done with a formula in Microsoft Excel. Range – The difference between the largest and smallest numbers in a group of data. 12,15,15,15,16,18,18,19,21 21-12= 9 Range. Hi Lo. Standard deviation – Standard deviation is a measure of the dispersion of data.
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[DOC File]Mean, Variance, and Standard Deviation
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Mean, Variance, and Standard Deviation. Let be n observations of a random variable X. We wish to measure the average of in some sense. One of the most commonly used statistics is the mean, , defined by the formula. Next, we wish to obtain some measure of the variability of the data.
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[DOC File]In statistics it is important to distinguish between a ...
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, denoted, is an average deviation of n observations. The formula is or for simplification . is called a deviation. is called a squared deviation. SSX is the Sum of Squared X deviations . Here is an example: Let X = the time, in minutes, it takes Joe to drive from Budd Lake, NJ, to Allentown, PA. Here are data from a sample of his driving times ...
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[DOC File]Appendix2 .edu
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average deviation. Which one you choose will depend on your need for precision. If you need a precise determination of some value, the best technique is to measure that value several times and use the average deviation as the uncertainty. Examples of finding the average deviation are given below.
how to calculate average deviation

Average deviation formula