What is Testing: Definition and 631 Discussions

A test or examination (informally, exam or evaluation) is an educational assessment intended to measure a test-taker's knowledge, skill, aptitude, physical fitness, or classification in many other topics (e.g., beliefs). A test may be administered verbally, on paper, on a computer, or in a predetermined area that requires a test taker to demonstrate or perform a set of skills.
Tests vary in style, rigor and requirements. There is no general consensus or invariable standard for test formats and difficulty. Often, the format and difficulty of the test is dependent upon the educational philosophy of the instructor, subject matter, class size, policy of the educational institution, and requirements of accreditation or governing bodies.
A test may be administered formally or informally. An example of an informal test is a reading test administered by a parent to a child. A formal test might be a final examination administered by a teacher in a classroom or an IQ test administered by a psychologist in a clinic. Formal testing often results in a grade or a test score. A test score may be interpreted with regards to a norm or criterion, or occasionally both. The norm may be established independently, or by statistical analysis of a large number of participants.
A test may be developed and administered by an instructor, a clinician, a governing body, or a test provider. In some instances, the developer of the test may not be directly responsible for its administration. For example, Educational Testing Service (ETS), a nonprofit educational testing and assessment organization, develops standardized tests such as the SAT but may not directly be involved in the administration or proctoring of these tests.

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  1. G

    Testing gradient against a value

    Homework Statement I have 25 pairs of values. I have a gradient and want to test if this gradient is significantly different from 1. Which stats test do I use? I thought of using a one-sample t-test, but how are you meant to put 25 gradients in the test!? thanks...
  2. S

    Solving Interference Issues in Circuit Testing

    Hello, I am making a circuit which runs a large current through a material at intervals, heating it, which then temporarily stops to make a resistance measurement. Each individual circuit is not an issue in itself, nor the timing of it since I have a computer interface which can grab analog...
  3. B

    Testing Fiberglass Panel: Unexpected Power Level Increase

    In testing the loss through a fiberglass panel I experienced instances where the received power level increased. I have checked and double checked my setup and changed the distances between the horn and panel, I still am seeing odd results. Has anyone had any experiences such as this. I am...
  4. S

    Series - Testing for Convergence / Divergence

    I have a few series which I'm having trouble proving whether they converge or diverge. I know the following tests for convergence: comparison test, ratio test, n-th term test, and root test. Here are the series and what I have tried so far: \sum n -1 / n2 : I'm assuming this series diverges...
  5. R

    Designing an Impact Force Testing Device

    Homework Statement I am creating a device to provide 250 to 300 g's of impact force to an electrical device in a plastic housing. I would like to lift a steel plate approximately 16" x 16" X thickness "T",, to a height of "Y" and release it. It would fall at the rate of gravity, impacting a...
  6. G

    One sided testing of two Poisson distributions?

    I want to test if one Poisson distributed result a is large than another one b. I don't know much about statistics, but I understood the Wiki article about testing normal distribution however they need the number of samples there. Basically I measure two Poisson distributed variables, I get two...
  7. M

    Micro tensile testing machines

    looking to design and hopefully build a micro-tensile tester to test the properties of human hair. as part of my uni class I need to design the grippers involved and have a look at non contact extensiometers. Could anyone point me in the right direction with some links or books? or even...
  8. S

    What are the key factors in understanding crash testing?

    hello everyone, I'm doing a presententation on the physics of crash testing next week. It should be around 10-12 mins, and I need to cover Environmental, Social, Technological and obviously Physics of the topic. Any help, tips, or information would be greatly appreciated? even book names that...
  9. S

    Testing Kelvin Planck's Second Law of Thermodynamics

    can anyone proove "kelvin plank" statement of second law of thermodynamics or atleast show that it is always followed in any cyclic process...
  10. J

    Medical MRI testing for Electrical Brain pulses?

    Hello, I don't know a lot on this subject, but at a last nights weekly philosophical discussion a friend mentioned that they could use MRI machines to scan and see electrical impulses light up parts of the mind during electrical impulse testing to the brain. I guess like showing images to...
  11. U

    VHDL Code: Testing Equality of Vectors

    Hi all, I have the following code: where checkHR and checkMIN are 8 bit vectors (7 downto 0)... and SECL, SECH, MINL, MINH, HRL, and HRH are all 4 bit vectors (3 downto 0). What I'm trying to do is check to see if the first four bits of checkHR is equal to HRH. Can someone tell me...
  12. T

    Can alternative gases be used to test water pipes for leaks?

    I work for a plumbing company, and we recently put up some copper water pipes (~30mm) in a newly constructed building. The buidling isn't finished, and since it's below 0 degrees we can't test the pipes with water. So, we though about doing it with air instead. Some people tell me that this...
  13. O

    Designing: Roll Cage with CAD+FE, Testing New Materials

    I am designing a Roll Cage (Using CAD+FE) and trying out new materials for testing/analysis. Commonly used materials i found are: * CDS Carbon Steel * ERW Mild Steel * DOM Mild Steel * Cr (Chrome Molybdenum) Steel * T-45 * 1020 Grade Mild Steel CDW Anybody...
  14. B

    Testing Compression/Tension of Popsicle Sticks in Physics Bridge

    How can I tell if the popsicle sticks in my physics bridge are under compression or tension. The weight is put on top of the bridge
  15. L

    Testing Hermiticity: How to Prove it?

    How do we know that a given operator is Hermitian. I know that for an operator A to be Hermitian then A=A+. But I don't know how to apply this on something which is not in a matrix form. For example I want to know if L_x (x component of angular momentum) is Hermitian and I have no idea how to...
  16. W

    Testing of Impact Sensor-Verify G-Force Readings

    Testing of Impact Sensor--Verify G-Force Readings I'm thinking either free fall test or pendulum but I was just curious if anyone could suggest an easier method We are looking for a way to test a newly developed impact sensor and verify that we when it says it has been hit with 5 g's for...
  17. P

    Testing Hypothesis of Fuel Rod Enrichment in Nuclear Reactor

    Homework Statement Measurements o the percentage of enrichment of 12 fuel rods used in a nuclear reactor were reported with a sample mean of 3.26. Test the hypothesis H_0: \mu=2.95 versus H_1: \mu\neq2.95, and draw appropriate conclusions. Use the p-value approach. Homework Equations...
  18. P

    Stats unknown variance hypothesis testing

    Homework Statement A machine produces metal rods used in an automobile suspension system. A random sample of 12 rods is selected and the diameter is measred.The sample mean is 8.28. and the significance level is 0.05. Is there strong evidence to indicate that mean rod diameter is not 8.20 mm...
  19. T

    Building and Testing a STM Circuit - Issues with Gain

    Hi, I'm building a STM, and this is the circuit I use : http://www.geocities.com/spm_stm/Simple_STM_Rev_C.PDF I'm right now testing the circuit I build. I build a small part (U3A), and then test it, and build another small part (U3B) and test, then connect the two and test it again...
  20. B

    Testing Ohm's Law: Everyday Items & Possible Errors

    i have to think of different ways to test ohms law but could only come up with using an ammeter and voltmeter..the typical experiment that is seen all over the internet. what way could i test this law using basic everyday things? and what errors could happen for the typical experiment? could...
  21. R

    How is a rocket's orientation determined during wind tunnel testing?

    How does a rocket get tested in a wind tunnel? what is it's orientation? an airplane is facing the air, like in reality, as it flies. so does that mean you mount a rocket vertically, but have the wind come on the side? or do you mount it pointing in the direction of the wind? and does...
  22. K

    Testing which vitamins work best?

    My girlfriend and I were talking, and she said that a way to tell if a vitamin is absorbed or not, is to mix a few different chemicals (can't remember what), and to see how the vitamin dissolves in this mixture. She said that it's because this mixture will have the same acidity as your stomach...
  23. J

    Testing Metallic Lustre: Metal vs. Non-Metal

    hey does anyone know how you can carry out an experiment to find out if a metal or non-metal has a metallic lustre?:confused: i have tried looking all over the internet but i can't find anything... if u could post answers or terms i can place into the google search panel it would be greatly...
  24. R

    Dry Lift Testing: Resources for Turboshaft Fuel Pumps

    Can anyone point in the direction of any information on dry lift testing for turboshaft fuel pumps? I need to write a good practices guideline for this and need to find as much info as I can. Thanks.
  25. L

    Testing Symmetry: X-Axis, Y-Axis, and Origin Explained

    I know there are 3 kinds of symmetry: x-axis, y-axis, and origin. So, if you test the function for symmetry and it turns that it has one of these, does it mean that it cannot have the others? Therefore, one function has one type of symmetry only?
  26. V

    What happened to the iconic Maths Tower at Manchester University?

    One fine day I was going about my business when I heard that the Maths Tower at Manchester University was to be demolished. I was shocked. To me it was an inspirational icon of learning, the thing that put the campus on the skyline, on the map, and on the picture postcards. I used to sit on the...
  27. E

    Shear cell testing, want to understand it completely

    Hello, I am working on a project where I will have to do some shear cell testing, I have some basic under standing (very basic). and I have done some research on the internet. I have a shear cell tester. it is very basic, geared motor with a rod to push on sample , which is under a weight. I...
  28. C

    Testing Iron Hardness & Cheap Magnetic Alternatives

    If I were to go to a random hardware store and look at some iron, how would I be able to tell how soft or hard the iron was? Also, is there any other cheap magnetic material that would work better then iron to make an electromagnet with? Thank you for your time.
  29. Pythagorean

    MATLAB Finding Realistic Data for Bandpass Filter Program Testing

    I want to work on a bandpass filter program, but I'd like some realistic data to try it on. There's got to be something on the web to write/test programs with. Any suggestions?
  30. M

    Wind Tunnel Testing Questions & Experiments

    Hello, Is there people amongst you who have ever dealt with Wind Tunnel testing? I cannot find a special section for experiments in this forum... I have a few topic to launch! Thanks...
  31. daniel_i_l

    Medical Testing Self-Awareness: How Do We Know?

    How do you know that other people are self-aware and not just very sophisticated computers? In other words, let's say you had a box with something inside that gave answers to your questions, how could you ever tell if the thing in the box was self-aware? If it's impossible then what's the...
  32. E

    Computing Type 1 Error Rate for Coin Test

    How would I compute the type 1 error rate of the following test: accept that coin is fair if in 30 tosses the coin gives between 11 and 19 heads (inclusive), reject otherwise. I guess my Ho is 11/30<p<19/30 and H1: p < 11/30 or p > 19/30 so type I prob = P(p < 11/30) + P(p > 19/30)...
  33. E

    Testing for unknown proportion

    Homework Statement for testing Ho : p = 0.2 vs H1: p > 0.2 when will the power of Rao score test be larger: 1. alpha = 0.05 n = 10 2. alpha = 0.01 n = 10 Homework Equations Rao score test: reject Ho when |sqrt(n)*(p' - po)/sqrt(po (1-po)| > z(alpha) po in this case = 0.2 and p' is...
  34. P

    Hypothesis testing with nominal data.

    Homework Statement I have two variables (both nominal) union membership 1/0 and race 1/0 and I have to find if there is a relationship between them. The task is formulated like so: "Is there a relationship between union membership and race (black versus non-black)?" I know I have to state...
  35. JasonRox

    Testing My Program: Killing Time and Eating Lunch

    I'm currently testing a program I made for my professor. It's just a simple test, but it will probably take like 15-20 minutes! So, I'm killing time. The nice thing about our small department is that I can take off and leave my laptop behind without worries. I'm going to do a more...
  36. S

    Testing for Convergence or Divergence of 1+sin(n)/10^n Series

    Homework Statement Does the sum of the series from n=1 to infinity of 1+sin(n)/10^n converge or diverge. Homework Equations The Attempt at a Solution I can use the comparison test or the limit comparison test. I'm not sure where to go from here.
  37. C

    Lunar Laser Rangefinding: Testing GR's Gravitomagnetic Phenomenon?

    A few weeks ago Physical Review published a Letter (an edited version of http://arxiv.org/abs/gr-qc/0702028" ) that says: "At this time, [Lunar Laser Rangefinding] provides the most precise test of [the gravitomagnetic phenomenon,..] likely better than the ultimate result from the GP-B...
  38. A

    Testing series with ln's for convergence

    I'm pretty embarassed that with a math degree I don't know how to do this. But today someone asked me to help him test this series for convergence: \Sigma \, ln(\dfrac{(k+1)^{2}}{k(k+2)} ) Maybe I'm just having a brain fart, but I can't think of any series to compare this to, and I...
  39. Robert100

    Testing string theory soon, with Cosmic Microwave Background?

    Has anyone heard of this proposed test of string theory's extra dimensions? What do you think? Within the realm of reason? Doable within the next decade? Robert === http://www.news.wisc.edu/13422.html ...physicists at the University of Wisconsin-Madison have devised an approach...
  40. S

    I need a free circuit testing program

    Does anyone here know of a good circuit testing program that is free that includes diodes? I need to find certain voltages on specific points on a circuit, and I can't find anything good out there that can help.
  41. P

    Find the Limits: Testing the Boundaries

    Find the Limits1. lim 312 x->11+ 2. lim (x^2 +9)/(x^2 -1) x->1for #2 i got 10 as the answer, but I'm not sure if its right. Thanks edit: Sorry, wrong forum
  42. C

    Hypothesis Testing: How to Recognize Ho & Ha

    I really don't understand hypothesis testing. How do I recognize which one is Ho and Ha in a problem? Is there a particular trick to facilitate my lfie?
  43. Q

    Mechanical experiments testing special relativity?

    Are there any experiments which test special relativity? I know of the Kennedy–Thorndike experiment, but it involves light. I am curious whether a different kind of experiments showing relativistic effects like time dilation or length contraction have been performed (I'm thinking of experiments...
  44. K

    Testing Real or Complex Roots: y=g(x)D^{k}f(x)

    For the function ## y=f(x) ## is there a test to prove if its roots are real or either has some complex roots?, or in more general cases: ## y=g(x)D^{k}f(x) ## k>0 and a real D=d/dx number.:rolleyes: :rolleyes: The question is that sometimes it can be very deceiving to tell if a function...
  45. T

    Is a Two-Sided t-Test Appropriate for Comparing Doctor Care Hours?

    Need to know the test that will be performed on the following question: The data comprises hours devoted to patient care per week for practitioners in conventional and alternative medical practices. Question: Can we infer that the mean amount of time devoted to patient care per week by...
  46. C

    Control System For Tensile Testing Machine

    Hi, I am doing a small project on the "construction and control of a modern tensile testing machine" and am a bit unsure as to where to start on this! Does anyone have any ideas as to where I could find information on this subject, or know anything that might be helpful? Thanks, Chris
  47. K

    Testing Testing out of calc based physics

    Dear all: I am a student at the University of Hartford and next semester I must take an Introductory physics course with basis on Calculus. Now I was pondering simply takeing a month or two and teaching it to myself and then testing out of the class so I can move onto more advanced...
  48. C

    Testing Iron Ions in Oxygen Absorbers

    how to test the component inside oxygen absorber in food?? we guess that there may be iron(II) or iron(III) ion. we use reducing agent or oxidzing agent to test it ? however, if both of them exist in the oxygen absorber, how can we distinguish them?? :confused:
  49. W

    How can I improve the accuracy of neoprene tear testing?

    Hello - I am working on a test for different neoprene mixtures. The set up is two jaws that clamp across the width of a strip of neoprene. One jaw is attached to a stationary post, the other is attached to a cylinder able to apply a variable pulling force. The problem I am having is...
  50. DaveC426913

    Testing IR Sensitivity: My Experiment

    I learned https://www.physicsforums.com/showthread.php?p=1098513&posted=1#post1098513" that some people are sensitive to lower frequency light than others. In fact, some people can see well into the infrared range. I was very skeptical, so I tested it out. I was right, I cannot see IR...
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