event

  1. L

    Sample size and probability hypothetical example

    Hi, I am trying to figure out a sample size for the following hypothetical example: Say there are 40 movie theaters in New York, 40 movie theaters in Los Angeles and 20 movie theaters in Miami. Each theater has 20 screens (rooms). So 100 theaters/2,000 screens total. Each theater will show a...
  2. A

    Logistic regression cutoff at 0.3

    Hi, I have built a logistic regression model with misclassification rate around 18%. When I look at the ROC curve(area under the curve is 0.76) and find out the accuracy at various cutoff points, the best accuracy is at 0.3 probability cutoff. Is 0.3 acceptable?Shouldn't the cutoff chosen be...
  3. O

    An event and its complement

    My wife was overdue clearing customs so I thought the probability of her showing up any minute was increasing. But then I thought, suppose -there is a snag in customs? -something else happened? -she is somehow not on this flight at all? so the probability of her NOT showing up any...
  4. O

    Correct approach to assessing correlation btn events in time domain?

    Hi Folks Firstly apologies if i have posted this in the wrong section - please feel free to advise or move as appropriate, and also apologies if I'm using the wrong terminology here and there - hope you can grasp what i'm talking about anyway! I am doing some research comparing low frequency...