attribute data

  1. 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...
  2. F

    Process capability - Negative Binomial

    Dear All, I have attribute that show overdispersion and seem to be distributed according to a negative binomial distribution. I have the following questions: 1. How can I check in Minitab if my data is distributed according to Negative Binomial? (I used Crystal Ball for this specific...