At an Arson Scene, Collecting a Substrate Control Would Require

question 12

Multiple Choice

At an arson scene, collecting a substrate control would require the arson investigator to:

• A)Collect a sample from the center of a potential accelerant stain.
• B)Collect samples of surface material from areas far away from the fire's origin.
• C)Collect a piece of the surface material near the fire's origin that he or she believes was not exposed to the accelerant.
• D)Collect a sample of the vapors at the fire origin.

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Definitions:

Parametric Test

A statistical test that makes assumptions about the parameters of the population distribution from which the sample was drawn.

Wilcoxon Rank Sum Test

A non-parametric statistical test used to compare two independent samples to assess whether their population mean ranks differ.

Wilcoxon Rank-sum Test

A nonparametric statistical test used to compare two independent samples to determine if they come from the same population or not, based on rank sums.

Wilcoxon Rank Sum Test

A non-parametric statistical test used to compare two independent samples to assess whether their populations have identical distribution.