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  1. J

    Logistics Regression and Decision Tree produced Different results

    Dear all, I am running both logistic regression and decision tree (CHAID) analysis for some data. Logistic regression produced the result which told me which variables were most important. I thought CHAID would put those same variables (as output by logistic regression) on the top of the tree...
  2. J

    Membership: Rising or Falling?

    Dear all, I am trying to find out whether number of members of my organisation has a rising trend or a falling trend. There are several groups of them: (1) Group A: retention rate = 90% (2) Group B: retention rate = 60% (3) Group C: retention rate = 20% Could anyone how can I find out whether...
  3. J

    Comparing Number of Members

    I had thought about using paired t-test earlier, but I thought it's not appropriate because I thought the 2 counts of each month is not from the same person or thing.
  4. J

    Comparing Number of Members

    Did you mean Chi square Goodness of fit ?? (If the data were not transformed into monthly data, then there'd be only 2 figures) Paired t-test?
  5. J

    Comparing Number of Members

    Dear all, Our organisation would like to compare the number of members between 2017 and 2018. The aim is to see whether number of members has increased significantly or not. The data will be transformed into monthly data (total of members by month). What statistical technique can be use? Is 2...
  6. J

    Linear Regression with Suburb Level Data

    A good number -- more than 100.
  7. J

    Linear Regression with Suburb Level Data

    Dear all, I am looking to discover what factor(s) is causing the high density of believers of a certain religion in several suburbs. In other suburbs, the densities do not reach that high level. So I am curious to find out what's driving these believers to pick those few suburbs -- is it ethnic...
  8. J

    SAS v R

    Yes, SAS is easy to learn, when compared to R. But SAS' syntax is weird, considered from perspective of a programmer. I've no idea why SAS is soooo expensive, any person of average salary won't be able to afford it, the only way to get a copy is to get the free academic version (which became...
  9. J

    Meta-analysis Help

    Hello hlsmith, thank you. The data I received are entirely summary data, not case data, ie count of successes, count of failures, count of total surgeries (see my first post). Can I still analysis without individual case data?
  10. J

    Meta-analysis Help

    Thanks for your reply, hlsmith. Is it time to event data or crossectional results? They were all surgical data (outcome = success or failure), so I believe they were not time to event data. Do all studies have the same length of followup? I don't think there was any follow-up, as they were...
  11. J

    Meta-analysis Help

    Dear all, I have been asked by someone to perform statistical analysis for a meta-analysis. The aim of the study is to compare between different surgical approaches. The data I got from this person are only summary data from past medical research results, for example: (1) in study No.1, using...