chi-sqaured

  1. D

    Power analysis and chi-squared control group sizes.

    hello, Quite new to stats, I've asked one question on here before and received a lot of really helpful information. If I can be helped again I'd be really grateful. at my job, the senior management, want to have the smallest control group possible, in order to expose the maximum amount of...
  2. L

    Reduced chi-squared test fit goodness

    In Origin Pro 9, I made 2 linear fits (y = kx + b). For example, I chose equation y = x + 10. In one case, I set experimental following points: x =1, y= 11 x = 2, y = 12 x = 3, y = 12.8 x = 4, y = 14.1 x = 5, y = 15 x = 6, y = 16 x = 7, y = 17.3. In another case, I set: x = 1, y = 10 x = 2, y =...
  3. M

    Positive chi-square test: what to do next?

    Hi!! I'm analysing two categorical variables, Landslides (YES/NO) and Vegetation (grouped into 18 classes), and I'd like to explore and model the relationship between them. Firstly, I've carried out a chi-square test for independence that has returned a positive result, i.e. the two...
  4. U

    1 predictor, 2 different values for baseline statistic & change statistic?

    Hi, I am conducting a Cox Regression for my first time. I created a simple model with only 1 predictor (categorical), one dependent variable (continuous survival time), and 1 event that defines whether the hazard criterion was met (dichotomous). Since there is only one step in this model, I...
  5. J

    Chi square help

    The student population of local college is approximately one-third blond and two-thirds other hair color. Over a 2-day period, the hair color of each student entering the student union building is tallied,with the following results: blonds, 452; others 1,548. Determine whether blonds and others...