Forensic Analysis - QA1

These flashcards cover key concepts related to statistical analysis and quality assurance in analytical chemistry as discussed in the lecture notes.

Mean Result (m)

The average value calculated by summing all measurements and dividing by the number of measurements.

Standard Deviation (S)

A measure of the amount of variation or dispersion in a set of values, calculated as S = √ ∑(xi – xmean)² / (n – 1).

Relative Standard Deviation (RSD)

A statistical measure of the precision of a set of values, calculated as RSD = (s / Xmean) × 100.

Outliers

Data points that differ significantly from other observations, potentially indicating variability in a dataset or measurement errors.

t-test

A statistical test used to compare the means of two groups and determine if they are significantly different from each other.

Independent Data

Data collected where each sample or measurement doesn't influence another, allowing for comparisons in statistical analysis.

Null Hypothesis

The hypothesis that there is no significant difference between datasets, which is tested against alternative hypotheses.

Quality Assurance (QA)

A systematic process to ensure that the quality of products or services meets specified requirements.

Quality Control (QC)

The operational techniques and activities used to fulfill requirements for quality, ensuring that products meet standards.

Confidence Interval (C.I.)

A range of values derived from a data set that is likely to contain the true value of an unknown population parameter.

Accreditation Bodies

Organizations that evaluate and recognize organizations or institutions as meeting certain predetermined quality standards.