Why do we need to have a two set up in an experiment?
The more samples presented at each test the better chance the scientist has of coming to a solid conclusion with little room for error.
Why is it important to compare the results of two trials of the same experiment?
When we do multiple trials of the same experiment, we can make sure that our results are consistent and not altered by random events. Multiple trials can be done at one time. If we were testing a new fertilizer, we could test it on lots of individual plants at the same time. What about Variables?
What is the main purpose of repeated experiments?
To repeat an experiment, under the same conditions, allows you to (a) estimate the variability of the results (how close to each other they are) and (b) to increase the accuracy of the estimate (assuming that no bias – systematic error – is present).
Why do we replicate experiments?
The replication reduces variability in experimental results. Stop of variability increases their significance and the confidence level. Finally, the researcher can draw conclusions about an experimental. Scientists must replicate experiments to ensure validity and account for error.
How does the control setup in an experiment differ from the other setups in the same experiment?
How does the CONTROL GROUP setup in an experiment differ from the other setups in the same experiment? It does not receive the experimental treatment (Independent Variable). A theory refers to a scientific explanation that is strongly supported by a variety of experimental data.
Why is there a need to have experimental and control setups?
A control is important for an experiment because it allows the experiment to minimize the changes in all other variables except the one being tested.
What is replication in research and why is it important?
Replication is one of the most important tools for the verification of facts within the empirical sciences. Any piece of research must be repeated by other investigators before its findings can be considered as reasonably well established. [Replicability] gives credibility to the conclusions of scientific research.
How are replicates used in the second experiment?
The second experiment uses replicates. The operators set the factors at predetermined levels, run production, and take one quality measurement. They reset the equipment, run production, and take one quality measurement. In random order, the operators run each combination of factor settings five times, taking one measurement at each run.
What is the purpose of the design of an experiment?
The design of experiments (DOE, DOX, or experimental design) is the design of any task that aims to describe or explain the variation of information under conditions that are hypothesized to reflect the variation.
How are two groups treated in an experimental design?
That’s exactly what an experimental design tries to achieve. In the simplest type of experiment, we create two groups that are “equivalent” to each other. One group (the program or treatment group) gets the program and the other group (the comparison or control group) does not. In all other respects, the groups are treated the same.
How is an interference pattern obtained from a double slit experiment?
Young’s double slit experiment gave definitive proof of the wave character of light. An interference pattern is obtained by the superposition of light from two slits. There is constructive interference when d sin θ = mλ ( for m = 0, 1, −1, 2, −2, . . .
