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[DOC File]SOME STATISTICS FORMULAS
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Measures of Variation: Range, Variance & Standard Deviation. Measures of Position: Obtain the Five number summary. Use Pearson’s Index of Skewness to determine if the distribution is skewed. Determine the coefficient of variation. Determine a z-score associated …
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[DOC File]Measures of Variation
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15. The coefficient of variation for a data set is the mean divided by the standard deviation, expressed as a percentage. 16. The interquartile range IQR is found by subtracting the mean from the maximum value of a data set. 17.
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[DOC File]3 .tw
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The coefficient of variation takes the standard deviation (in years) divided by the mean (in years) and hence has no units at all. PTS:1REF:SECTION 4.2 127.The number of hours a college student spent studying during the final exam week was recorded as follows: 7, 6, 4, 9, 8, 5, and 10.
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[DOCX File]Describing and Interpreting Data - UH
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31. The coefficient of variation is a measure of relative dispersion that expresses the standard deviation as a percent of the mean. Answer: 32. The Pearson's coefficient of skewness is a measure of distribution's symmetry. Answer: 33. The coefficient of variation is useful for comparing distributions with different units. Answer: 34.
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Coefficient of Variation
coefficient of variation The coefficient of variation expresses the standard deviation as a percentage of what is being measured relative to the sample or population mean. If x bar and s represent the sample mean and the sample standard deviation, then the coefficient of variation …
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[DOC File]Chapter 3 - Data Description
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b. interquartile range. c. range. d. coefficient of variation. 9. In computing the hinges for data with an odd number of items, the median position is included. a. only in the computation of the lower hinge. b. only in the computation of the upper hinge. c. both in the computation of the lower and upper hinges. d. None of these alternatives is ...
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[DOC File]CHAPTER THREE
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since the coefficient of variation is scale-invariant, it is very useful for comparing the dispersion of different data. For example, in the previous battery data, if the lifetime of the batteries from factory 1 and factory 2 are measured in minutes and hours, respectively, the standard deviation for factory 1, 6.3245, would be larger than for ...
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[DOC File]Coefficient of Variation:
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Coefficient of Variation The values of the range and standard deviation are positive, and as the value increases as the spread of the data increases. If there is no variation, these measures equal 0.
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Coefficient of variation range