1. W

    ?Pearson ?point-biserial correlatiom coefficient for relationship between variables

    Hi, I'm new on this forum, thanks for reading my post! I'm trying to figure out if I've used the best method for determining a relationship between variables (calculations done using Excel). I have a cohort of 38 trauma patients of different ages. I have measured their aortic diameter on...
  2. A

    reliable results?

    Hi, my name is Dave. I am a recent graduate trying to pass a licensing-exam with the state of California. I think I passed the test (my score=73%), but they use a criterion-referencing method where results are compared to a criterion (their passing score= 75%) rather than to the mean. The idea...