statistically significant

  1. A

    [R] - Test to say if I can accept or not my data in a right-skewed distribution

    Hi, I'm new in Statistics world and I have a problem I don't know how to deal with. Sorry in advance for my English, I'll try to be as clear as possible. I have a dataset of 9000 machines that need to have a specific repair. For each observation I have the repair time used. I know from the...
  2. M

    evaluating statistical difference between model coefficients: 2 different models

    Hello, I have two logistic regression models with the same dependent and independent variables. The only difference between the 2 models is the way the data are aggregated: one model is based on census tracts, and the other on parcels. I want to determine whether there is a statistically...
  3. S

    Statistical test over binary data

    Given certain products (ProductA, ProductB, ProductC, etc..) users are asked to rank them according to theirpreference (whether they like , somewhat like or not like the product). Thereafter I have extracted certain binary features from these products (handle is present or not, etc..) and now...
  4. N

    T-test puzzlement

    I've been pondering on this for some time and I guess i'm confused because there are so many stats tests out there. Basically my aim is to figure out if there is any statistical relevance between years of English learnt and correct answers on an English test. I have put years into months...
  5. E

    Is Increase statistically significant?

    Hi, This is not for a class or homework. Here is the situation: A: Sample size of 15,406,248 - these are the people who were NOT exposed to X B: Sample size of 5,769,614 - these are the people who were exposed to X Out of A: 0.01% of people called back Out of B: 0.04% of...