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quartile deviation

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Journal Article
Published: 01 February 1975
Journal of the Geological Society (1975) 131 (1): 51–56.
...JOHN McMANUS Abstract Quartile deviation-median diameter analysis is sufficiently sensitive to permit sectors of bed characterized by wave or current dominant sediments to be recognized. These may be related to modern conditions or to erosion of buried sub-recent deposits which cores indicate exist...
Journal Article
Published: 01 February 1974
Journal of the Geological Society (1974) 130 (1): 79–83.
...ANTONY T. BULLER; JOHN McMANUS Abstract Textural differences between present-day sediments collected from fluviatile, beach and aeolian environments, can be demonstrated by plotting values of quartile deviation measures (QDa) against the medians (Md) on double-log paper for each environment...
Journal Article
Published: 01 November 1972
Geological Magazine (1973) 109 (6): 491–500.
...A. T. Buller; Mcmanus J. Abstract Analyses samples of turbidites from the Gulf of Alaska, Arctic Ocean, Norwegian fjords and elsewhere and presents plots of quartile deviations and medians from grain-size distributions. These are compared with similar analyses of ancient turbidites. Implications...
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(a) Evolution of the miospore diameter through the composite section. Mean size and quartile deviations of the whole miospore population are shown by the vertical dashes and solid curved line. The black dotted line shows evolution of the mean size of the studied Emphanisporites population and the enclosing curve in grey represents its quartile deviations. (b) Relative abundance of the four varieties through the composite section. 1 – E. micrornatus var. micrornatus; 2 – E. micrornatus var. sinuosus; 3 – E. zavallatus var. gedinniensis; 4 – E. zavallatus var. zavallatus.
Published: 01 May 2005
Figure 7. (a) Evolution of the miospore diameter through the composite section. Mean size and quartile deviations of the whole miospore population are shown by the vertical dashes and solid curved line. The black dotted line shows evolution of the mean size of the studied Emphanisporites
Journal Article
Published: 01 March 1962
Journal of Sedimentary Research (1962) 32 (1): 15–25.
...Gerald M. Friedman Abstract It has been shown that a linear relationship exists for size analysis between the quartile measures of sieving and thin-section data. This study has been extended to moment measures since they are the most suitable statistics for describing the textural characteristics...
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Thicknesses of 44 floodplain aggradation cycles in the composite stratigraphy of the McCullough Peaks area (Wyoming, USA). (A) The bar diagram depicts the labeling system and the variability in floodplain aggradation cycle thickness. (B) The boxplot shows the mean (6.8 m), standard deviation (2.0 m), and coefficient of variation (standard deviation/mean; 29%) of these 44 floodplain aggradation cycles’ thicknesses. The box boundaries represent lower and upper quartiles, lines extending from boxes indicate the 1st to 2nd and 3rd to 4th quartile ranges, lines and squares within boxes indicate median and mean values, and points outside boxes represent outliers. The meaning and stratigraphic positions of ETM2 and H2 are illustrated in Figure 1B. n—number of samples; std—standard deviation.
Published: 18 October 2023
deviation (2.0 m), and coefficient of variation (standard deviation/mean; 29%) of these 44 floodplain aggradation cycles’ thicknesses. The box boundaries represent lower and upper quartiles, lines extending from boxes indicate the 1st to 2nd and 3rd to 4th quartile ranges, lines and squares within boxes
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Box and Whisker plots of sample standard deviation of the mean relative differences (SDMRD) for three categories of extent (<200, 200–2000, >2000 m). The caps at the end of each box indicate the minimum and maximum, the lower and upper quartiles delimit the box, and the line in the center of the box is the median. Black dots are outliers, more than 1.5 times the inter-quartile range larger than the upper quartile. Different letters represent different averages at p < 0.001.
Published: 01 November 2012
Fig. 10. Box and Whisker plots of sample standard deviation of the mean relative differences (SDMRD) for three categories of extent (<200, 200–2000, >2000 m). The caps at the end of each box indicate the minimum and maximum, the lower and upper quartiles delimit the box, and the line
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Published: 01 February 2012
Table 2. Summary of statistical descriptive parameters of centering, dispersion and shape. Concentrations in mg/kg. N, north cores; S, south cores; 1 , this work; 2 , Oruro Pilot Project (PPO); MAD, median absolute deviation; Q 2 , second quartile; Q 3 , third quartile
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Box and Whisker plots for the sample standard deviation of the mean relative differences (SDMRD) according to surface (from 0 to 0.2 m), profile (from 0 to 0.3 m and deeper), and subsurface (at specific depths, with varying thickness) soil water content (SWC) measurements. The caps at the end of each box indicate the minimum and maximum, the lower and upper quartiles delimit the box, and the line in the center of the box is the median. Black dots are outliers, more than 1.5 times the inter-quartile range larger than the upper quartile. Different letters represent different averages at p &lt; 0.05.
Published: 01 November 2012
Fig. 8. Box and Whisker plots for the sample standard deviation of the mean relative differences (SDMRD) according to surface (from 0 to 0.2 m), profile (from 0 to 0.3 m and deeper), and subsurface (at specific depths, with varying thickness) soil water content (SWC) measurements. The caps
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Box plots showing variations in standard deviation (SD) for all parameters relative to the initial prior distribution after nine different two‐step updates, the combination of all two‐step posteriors, and a one‐step update with only the historical catalog. The variations in SD are estimated for the 17 parameters, and the boxes highlight their median, lower quartile, and upper quartile. (a) Initial prior distribution with LSD of 0.8 and (b) initial prior distribution with LSD of 1.2. The color version of this figure is available only in the electronic edition.
Published: 29 June 2021
Figure 11. Box plots showing variations in standard deviation (SD) for all parameters relative to the initial prior distribution after nine different two‐step updates, the combination of all two‐step posteriors, and a one‐step update with only the historical catalog. The variations in SD
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Performance plots of VS30 prediction models using (a) all VS30 data, (b) only data from Quaternary–Pliocene units, and (c) all VS30 data from California. Histograms of measured and predicted VS30 values with their PDFs on the left, logarithmic ratio between measured and predicted VS30 values with medians (η) and standard deviations (σ) in the middle, and box‐whisker plots of residuals (measured–predicted) with outliers on the right. The box represents the interquartile range (IQR) between the first and third quartiles, the line and cross within the box display median, and mean, respectively. Whiskers extend 1.5 times the IQR above the third quartile and below the first quartile. Residuals beyond this range are considered outliers and displayed with circles. The color version of this figure is available only in the electronic edition.
Published: 21 December 2023
, logarithmic ratio between measured and predicted V S 30 values with medians ( η ) and standard deviations ( σ ) in the middle, and box‐whisker plots of residuals (measured–predicted) with outliers on the right. The box represents the interquartile range (IQR) between the first and third
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Published: 22 October 2024
Table 1. Summary statistics of the populations of whole-shell TE/Ca values, including number of individuals measured, the mean, standard deviation, maximum and minimum values, the range, and inter-quartile range. Note that these values were calculated to include outliers that are not incorporated
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Assumed log-normal distribution of platelet diameters (mean μ = 500 Å, standard deviation σ = 1.73 Å). Each quartile is represented by its mean value.
Published: 01 August 2016
Figure 1. Assumed log-normal distribution of platelet diameters (mean μ = 500 Å, standard deviation σ = 1.73 Å). Each quartile is represented by its mean value.
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Distributions of back‐azimuth errors corresponding to the frequency bandwidths. (a) Back‐azimuth errors at each passband. The back‐azimuth errors are denoted by gray circles. Error bars were plotted using the average and standard deviation obtained from the errors at each passband. (b) Accuracy of back‐azimuth estimation by applying single (gray box plots) and multiple (black box plots) passband to the automatic array system. At the right side of each box plot, information such as maximum (max), upper quartile (Q3), median (med), lower quartile (Q1), minimum (min), and number of data (N) are provided.
Published: 17 February 2023
Figure 6. Distributions of back‐azimuth errors corresponding to the frequency bandwidths. (a) Back‐azimuth errors at each passband. The back‐azimuth errors are denoted by gray circles. Error bars were plotted using the average and standard deviation obtained from the errors at each passband. (b
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Estimated rotation angles for stations and epochs that deviate by more than 7° from the reported orientation. The uncertainty of each estimate is given by the horizontal error bar and corresponds to the range of the second and third quartiles of individual measurements. Station, channel, reported channel orientation, epoch start time, epoch end time, number of observations used in the calculation of the median, and the median deviation δα⋆ are listed for each estimate. The deviation for BASO‐PO (bottom row) is 85°.
Published: 22 May 2018
Figure 10. Estimated rotation angles for stations and epochs that deviate by more than 7° from the reported orientation. The uncertainty of each estimate is given by the horizontal error bar and corresponds to the range of the second and third quartiles of individual measurements. Station
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Comparison of minimum limiting bedrock and boulder sample age populations shown by box and whisker plots (bedrock, n = 20; boulders n = 13). The box encloses the area between the first and third quartiles, and the horizontal line represents the median. Whiskers show one standard deviation. Samples that lie outside one standard deviation from the mean are shown with an asterisk; all other samples are shown with dots.
Published: 01 September 2013
Figure 11. Comparison of minimum limiting bedrock and boulder sample age populations shown by box and whisker plots (bedrock, n = 20; boulders n = 13). The box encloses the area between the first and third quartiles, and the horizontal line represents the median. Whiskers show one standard
Journal Article
Published: 01 September 1952
Journal of Sedimentary Research (1952) 22 (3): 125–145.
...Douglas Lamar Inman Abstract Numerous measures are used in the literature to describe the grain-size distribution of sediments. Consideration of these measures indicates that parameters computed from quartiles may not be as significant as those based on more rigorous statistical concepts...
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Empirical path corrections (dots) as a function of epicentral distance (a) and their standard deviations versus epicentral distance (b). The solid line connects the medians of every 5 percentile points of data, the bars indicate the range, and the boxes indicate the 25% and 75% quartiles.
Published: 01 August 2004
Figure 9. Empirical path corrections (dots) as a function of epicentral distance (a) and their standard deviations versus epicentral distance (b). The solid line connects the medians of every 5 percentile points of data, the bars indicate the range, and the boxes indicate the 25% and 75
Image
Empirical path corrections (dots) as a function of epicentral distance (a) and their standard deviations versus epicentral distance (b). The solid line connects the medians of every 5 percentile points of data, the bars indicate the range, and the boxes indicate the 25% and 75% quartiles.
Published: 01 August 2004
Figure 9. Empirical path corrections (dots) as a function of epicentral distance (a) and their standard deviations versus epicentral distance (b). The solid line connects the medians of every 5 percentile points of data, the bars indicate the range, and the boxes indicate the 25% and 75
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Foraminiferal and environmental data of the five live assemblages: A Average density of live foraminifera with one standard deviation error bars, B Fisher's α diversity, C organic carbon estimate, D salinity, E elevation box plot of all sites of live assemblages. Note: Tidal datums (dotted lines) indicated are from Grand Bay NERR tide gauge. Number in brackets after assemblage name indicates number of samples (n). Vertical bars denote data ranges, dots the arithmetic mean, box plots show first quartile, median, and third quartile. Abbreviations: %LOI OC = % Loss On Ignition Organic Carbon; NR = Not Recorded; MHHW = Mean Higher-High Water; MTL = Mean Tide Level; MLLW = Mean Lower-Low Water.
Published: 11 January 2019
Figure 6. Foraminiferal and environmental data of the five live assemblages: A Average density of live foraminifera with one standard deviation error bars, B Fisher's α diversity, C organic carbon estimate, D salinity, E elevation box plot of all sites of live assemblages. Note: Tidal