A fractional factorial experiment is generated from a full factorial experiment by choosing an " alias structure ".
12.
A fractional factorial experiment is generated from a full factorial experiment by choosing an " alias structure ".
13.
To save space, the points in a two-level factorial experiment are often abbreviated with strings of plus and minus signs.
14.
Rather than the 32 runs that would be required for the full 2 5 factorial experiment, this experiment requires only eight runs.
15.
Shainin further developed this work into an analysis of variance, or ANOVA, permitting non-parametric analysis of Fisher s full factorial experiments.
16.
As with any statistical experiment, the experimental runs in a factorial experiment should be randomized to reduce the impact that bias could have on the experimental results.
17.
Normal plots are often used with as few as 7 points, e . g ., with plotting the effects in a saturated model from a 2-level fractional factorial experiment.
18.
For example, with two factors each taking two levels, a factorial experiment would have four treatment combinations in total, and is usually called a " 2? factorial design ".
19.
For example, the five factor 2 5 & minus; 2 can be generated by using a full three factor factorial experiment involving three factors ( say " A ","
20.
As a result of doing less experiments, the amount of information that is generated from a fractional factorial experiment is less than from a full factorial experiment, but the practical difference may not be great.
