experimental

  1. M

    standard deviation of a division

    Hi, I have a rather easy question: I have a batch of different dried fruits, let's say n=100, with a diameter of 8±2 cm, 2 being the standard deviation. After throwing them in water the distribution of the batch's diameters is let's say 16±5 cm because of the swelling. This results in a size...
  2. J

    Calibration and Verification Error of a Six Axis Load Measurement Unit

    I want to calibrate a 6 axis load measurement unit. The inputs are 6 voltages, representing 6 linearly independent forces. The output is 6 forces (three linear forces and three moments, perpendicular, linearly independent). inputs: v_1, v_2, ... v_6 outputs: f_1, f_2, ... f_6 I can apply...
  3. L

    Dependant Probability - Theoretical and Experimental have different outcomes?

    Ok, I hope someone might be able to offer me some assistance into why i'm seeing a difference between what i believe to be the correct method to calculate dependant probability. Scenario: Coin bag of 8 weighted coins containing coins weighted for heads (0.5, 0.5, 0.6, 0.6, 0.7, 0.9, 0.5, 0.5)...
  4. R

    comparing simulated and experimental data

    Hi All, I generated a time series data by simulation (each condition has been generated time condition1 condition2 condition3 .... condition50 0 70 70 70 70 20 67.3 69 70 56 30 67...
  5. R

    Comparing exp and control groups in a mixed design with a comparatively small N

    My study investigates the type of dialogue and behavior between children working in groups on a class activity, with and without an intervention. It is a small project with an experimental design, three experimental and three control participants (in this case each participant is a group of...
  6. P

    sample size for control and treatment groups

    hello everyone, I am in the process of designing an agricultural experiment in which I want to compare a series of variables between a group of manufacturers who use a mobile telephone app (n=15,000) is my treatment group and another group that does not (n=100,000) which is my control group...
  7. O

    Bootstrapping question - comparing classifier accuracy

    Hi, I'm developing a classification system for objects. I have a total of 20 different objects that the system should classify, but I want to test the system with a varying number of classes. (3 objects at a time, 4 objects at a time etc.) What I thought of doing is the following: For each...
  8. R

    Which sig test to use?

    I want to compare a change in 2 experimental groups to the change in 2 control groups. So I have results for one sample, then retested among another indepedent sample, and was tested among a control group, then retested among a different control. For example, the 1st experimental group had a...