minimum sample size

  1. D

    Back-calculation (a posteriori) of the minimum sample size for a mechanical experiment

    Hello, I want to back-calculate the minimum sample size for a mechanical experiment. I have a known mean and standard deviation of a statistical population. From the statistical population I chose two samples with means and standard variances I could estimate. My question is: How can I...
  2. T

    Minimum Accepted Sample Size for Tolerance Interval (confidence interval)

    Hi, I'm using the tolerance interval function in minitab, my sample size is limited to 7 (the parts are expensive blah blah) I've heard to be statistically significant a sample size of 30 is recommended but in practice how low can I go for sample size when using a confidence / tolerance...