Statistical Tests and Tools

Tools are needed to determine accuracy and precision within tests and testing materials. The following are a few terms and tests used.

Standard Deviation and Relative standard deviation (R value)

Confidence intervals

Detection Limits

Quantitation Limit

Sensitivity

P-Values
      Probability of obtaining test results, or how likely the result is to occur

T-Test
     Probability for two samples to originate from the same distribution, one sample against theoretical, or compare two sets of data.

Cross-Validation/10-fold
      Data partitioning to evaluate independent data.

 F-tests
     Identify model that best fits the population a set of data originates from.

Quality Tools

Cause and effect diagram (fishbone/Ishikawa)

Control Chart

Histogram (bar)

Pareto chart (bar)

Scatter diagram (X-Y chart)

Stratification (I usually use a flow chart instead)

Box-Plot