chi

  1. B

    Adjusted residuals Chi square - Interpretation correct?

    Hello! I'm looking for help with a chi-square independence test. I carried out this test to check if there was an association between X & Y (both nominal variables). Then, I used adjusted residuals and the Bonferroni Corrections to identify which ones were the actual relationships. However...
  2. S

    Compare odds in two fisher tests

    Dear all, I performed 3 fisher tests from data implicating in each test the same two sets (A & B) with two different sets in each case (A&B vs C&D, A&B vs E&F, A&B vs G&H; tables below). Fisher tests for the three sets gave low p values with odds of 6.6, 3.6 and 2.5. I need to know if the...
  3. L

    Chi squared for randomness

    Greetings, I am testing pseudo-random number generators and need to perform a chi-squared test. However, I've encountered some difficulties. Let's take the following example: I have generated 100 numbers, ranging from 1 to 10. The distribution is as follows: 1: 8 2: 12 3: 9 4: 11 5...
  4. D

    Distribution of Extreme Spread for (n, sigma)

    Given a Rayleigh process R(s) generating samples X_i -- which is equivalent to a bivariate normal process with 0 correlation and both sigmas = s -- what is the distribution of the Extreme Spread of n samples? Extreme spread ES\{X\}_n \equiv max_{i, j}|X_i - X_j| E[ES_n(\sigma)], and...
  5. F

    Statistics Help Much Appreciated

    Hi, I'm revising for my upcoming exam and I have pastpapers but they don't give us the answers and I am unsure whether I have two questions right and I don't want to be learning the wrong answers, if someone could help I'd much appreciate it, Thankyou. For 5.1 I thought the answer was B...
  6. V

    Is a chi-square test appropriate? Can I make a more comprehensive analysis?

    Hi There, I am new to the research field, and I am currently trying to find a way to apporpriately analyze some data that I have collected. I am working in the biological sciences, and have read through the pages of suggested tests at http://udel.edu/~mcdonald/statchiind.html - which was...
  7. S

    Calculation of x2-probability - formula

    Hey guys. I'm currently working with Stata and a nominal data set. I've done a chi^2 test and found a P-value (0.023), but I would really like to understand how Stata goes from chi^2 result of 14.5391 and 5df to a P-value of 0.023. Could someone explain to me, how to calculate this? I see...
  8. drewmac

    DF and fishers vs. pearson's

    Hallo everyone I'm having a mental block today, and having trouble getting my df value. So, here's a summary of my data to help: 32 participants face-to-face 18 participants online 40 questions; binomial correct/incorrect answers I'm comparing the accuracy rates of the face-to-face...