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The seismic data is then carefully processed to preserve seismic amplitudes and accurately determine the spatial coordinates of each sample. This allows a geophysicist to construct a group of traces with a range of offsets that all sample the same subsurface location in order to perform AVO analysis.
Quantitative seismic attribute analysis of amplitude versus offset effects is complicated by anelastic attenuation because it is superimposed upon the AVO effects. [3] The rate of anelastic attenuation itself also contains additional information about the lithology and reservoir conditions such as porosity , saturation and pore pressure so it ...
The aim of such techniques as ANCOVA is to remove the effects of such uncontrolled variation, in order to increase statistical power and to ensure an accurate measurement of the true relationship between independent and dependent variables. [8] An example is provided by the analysis of trend in sea-level by Woodworth (1987). [9]
The F-test is computed by dividing the explained variance between groups (e.g., medical recovery differences) by the unexplained variance within the groups. Thus, = If this value is larger than a critical value, we conclude that there is a significant difference between groups.
Meanwhile, in a medium heatproof bowl, microwave chocolate in 30-second increments, stirring between each, until melted and smooth, about 1 minute total. Add oil and stir to combine.
Difference in differences (DID [1] or DD [2]) is a statistical technique used in econometrics and quantitative research in the social sciences that attempts to mimic an experimental research design using observational study data, by studying the differential effect of a treatment on a 'treatment group' versus a 'control group' in a natural experiment. [3]
Ellen Greenberg was found dead in 2011 in her Philadelphia apartment with 20 knife wounds and numerous bruises. Authorities ruled her death a suicide. Fourteen years later, the pathologist who ...
Tukey defined data analysis in 1961 as: "Procedures for analyzing data, techniques for interpreting the results of such procedures, ways of planning the gathering of data to make its analysis easier, more precise or more accurate, and all the machinery and results of (mathematical) statistics which apply to analyzing data."
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