What is Experimental data: Definition and 67 Discussions

Experimental data in science and engineering is data produced by a measurement, test method, experimental design or quasi-experimental design. In clinical research any data produced are the result of a clinical trial. Experimental data may be qualitative or quantitative, each being appropriate for different investigations.
Generally speaking, qualitative data are considered more descriptive and can be subjective in comparison to having a continuous measurement scale that produces numbers. Whereas quantitative data are gathered in a manner that is normally experimentally repeatable, qualitative information is usually more closely related to phenomenal meaning and is, therefore, subject to interpretation by individual observers.
Experimental data can be reproduced by a variety of different investigators and mathematical analysis may be performed on these data.

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  1. rhody

    Sounds of experimental data at the LHC

    http://lhcsound.hep.ucl.ac.uk/page_library/SoundsLibrary.html" This above link that has 17 different sounds: and http://www.physorg.com/news196520209.html" Rhody... :wink: P.S. They use every trick in the book to give the data analysis team(s) every advantage not to miss...
  2. G

    Experimental data interpolation in COMSOL

    Here's a question for the COMSOL whizzes: I'm using the COMSOL 3.5a Diffusion Toolbox. I have a 1D reaction-diffusion model that is controlled by a catalyst. The spatial distribution of catalyst along the 1D space is independent of the other chemical species and I have data for the...
  3. D

    A question about uncertainty using a regression line and experimental data

    Homework Statement I'm new to uncertainty, so I needed a little assistance. The circuit in this experiment was simple, a dry cell connected to a variable resistor. I used an ammeter on the circuit and used a voltmeter across the resistor and took some measurments. The experiment was to...
  4. S

    Variance of experimental data, compared to Theory

    I'm looking for a way to compare experimental and theoretical data and determining if it obeys a certain law. In particular, I'm writing a computer program that does this and at the moment what I'm doing is, I'm calculating the ratio of each reading with the theoretical result and calculating...
  5. T

    Optimal Approach for Analyzing Non-Smooth Experimental Data

    Hi, I need your help. From experiments I got data set which I need to analyze. The problem is that my data is not smooth. I tried to fit my data using a polynomial equation, but the fitting was not good enough. I also tried to smooth, spline... but got very different final results. Can anyone...
  6. K

    Photoelectric effect experimental data current vs. intensity vs frequency

    The photoelectric current is known to be directly proportional to the intensity of incident light with fixed frequency. Questions: 1) What are the experimental values of this proportionality constant for various fixed frequencies? 2) Is there a theoretical derivation that provides a formula...
  7. B

    Physical law from experimental data

    Consider that high quality experiments furnish data that relate proper time intervals to coordinate time intervals for different values of the relative velocity (life time dilationf moving mesons). An inteligent computer program could find out the best function of the relative speed which...
  8. L

    Analysing Experimental Data (PHOTOS INCLUDED)

    Homework Statement http://img217.imageshack.us/my.php?image=dscf3381gv1.jpg2. The attempt at a solution http://img113.imageshack.us/img113/6683/dscf3380tp0.jpg It's really confusing, and the teacher didn't really go too much indepth on how to work this, so far i plotted the data, i used...
  9. W

    Experimental Data: Light Velocity Change

    Are there any experiments that show how light is treated as a frames velocity is changed (not the light source, rather the "eye".) For example if a huge clock that is counting down from 10 is 10 light seconds away before I accelerate (at t=0) to a velocity where my length contraction is *.5 (I...
  10. G

    Should linear regression always be forced through the origin?

    Wasn't sure which section this should be in, so please move if inappropriate. If a plot between two variables theoretically should pass through the origin, should you force the linear regression through the origin. I seem to get a much better value for my gradient when forced through the origin...
  11. M

    Programs Experimental data in theoretical PhD?

    Hi all, I was wondering if PhD students in theoretical aspects of cosmology,gravitation, black holes... etc do any/much analysis of experimental data, and just mainly omit observational technique, or if their entire education is in learning physical theory and making predictions and solving...
  12. B

    Finding gravity through experimental data

    Homework Statement Experimentally measured time of fall vs. distance for a freely falling object Distance, x (m) Time, t (s) 0.1 0.148 0.2 0.196 0.3 0.244 0.4 0.290 0.5...
  13. H

    Fourier analysis of my experimental data

    hi Im doing a project about chaos theory. Over the past few weeks I've built a Lorenzian waterwheel (its a waterwheel with buckets with holes in them, it shows chaotic behaviour.) One of the aims of the experiment was to try and plot the Lorenz attractor. The lorenz attractor is a strange...
  14. L

    Speed of light in the universe, experimental data

    I would like to compile direct and indirect data on the speed of light in the universe.o:) How much evidence do we have that it is constant, even close to a black hole? What kind of observations could be relevant to answer such a question? Thanks for your comments, links and references...
  15. L

    Bremsstrahlung near the cutoff frequency, experimental data

    Goodmorning, I would be interrested in experimental data regarding the Bremsstrahlung process near the quantum mechanical cutoff, possibly single events data. I thought that maybe something like a bubble chamber picture could illustrate this process. This is maybe a naïve dream but this...
  16. J

    Calculating heat transfer coefficient from experimental data

    I have a graph which shows the rate of cooling of a tent from about 35 deg C to 15 deg C, it looks like this: http://students.bath.ac.uk/en0jma/graph.gif How do I work out the convective heat transfer coefficient of the tent from this data? Thanks for any help
  17. C

    Ive been accused to fake experimental data and thats false

    I might not have carried out my experiment very rigorously using a toy gyroscope that lasts 7 minutes. But in 20 measures the two top lasting winds were the ones that had precession and the rest were showing equal lasting with variations of 30 seconds usually
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