discrete data

  1. Y

    Which model/statistical test should I use?

    Hi, Soon I will be performing an experiment where I must grow 4 different plant species under 4 different stressors, each stressor containing 4 levels of 'severity' of the stressor or in other words a difference in concentration. Growth of the plants will be measured over 22 time points, but...
  2. M

    Help with normal distribution

    Hello friends of the forum I have the following doubt ... If I have a sample of only 24 discrete data, how can I prove that these data follow a normal distribution? When I enter the data into a specialized software, the software tells me that the sample fits a normal distribution, but I'm...
  3. Z

    Test Statistic for Comparing Two Groups of Discrete Data on a Per Unit Basis

    I work in a small MEMS fab. I have a spin coating process where polymer is dispensed, spun and cured on individual wafers. Following the cure I use a wafer particle scanner that can count the number of defects on each wafer. I performed a experiment aimed at reducing the number of particles...
  4. rogojel

    beating the rules at discrete sampling

    hi, I am looking at the question of how to sample rare occurances, like a rare defect in a manufacturing line. If I use the standard sample size formula the sample size goes into hundreds, which is unreasonable due to the long waiting times. My idea s to measure the time intervals between...