While students in our college-level introductory biology courses for majors can list the steps of the scientific method, a majority are uncertain about designing a controlled experiment and fail to understand the impact of the experimental variables
on the result of the experiment (Grunwald & Hartman, 2010).
Models 2 through 8 include the control variable plus one experimental variable
What experimental variable
did you examine in Week 2?
HTR developed at Dow is an integrated set of advanced capabilities in hardware and software that allow many more experimental variables
to be explored and understood than could be achieved with traditional approaches.
The RSM is a collection of statistical and mathematical techniques used to examine the relationship between one or more response variables and a set of quantitative experimental variables
Matching may well occur in the space defined by the intersection of one set of experimental variables
When a stimulus is applied, the organism responds; thus, bioassays provide a means to quantify an organismal response or responses to manipulated experimental variables
The independent experimental variables
included plate thickness, metallostatic height, surface state (machined or as-cast) and molding aggregate (resin bonded and sodium silicate).
Figure 1 illustrates the experimental facility consisting of a supply-air conditioning apparatus, a test room, an exhaust system, and instruments for measuring experimental variables
at the principal points.
Each sample was evaluated in a test chamber with experimental variables
of temperature, air flow rate, relative humidity, and sampling times.
At the conclusion of the experiment, the students were examined with a PAQ posttest, and pretest and posttest means were computed on the three experimental variables
for each of the groups.
This equipment is operated by computer and permits precise control of all experimental variables
That is, are there experimental variables
whose values I did not consider that could have drifted from one experiment to the next and caused large differences in observed results?
Chapter Titles: Background Theory and Principles of Capillary Electrophoresis; Modes of Separation; Experimental Variables
in Capillary Electrophoresis; Method Development for Capillary Electrophoresis; Method Development: Capillary Zone Electophoresis; Method Development: Micellar Electrokinetic Chromatography; Method Validation and Transfer; CE Troubleshooting; CE Applications for Food Analysis.
LaFrance kept all other experimental variables
constant, or unchanged, so as not to interfere with volunteers' answers.