Rosa Eugenia Jiménez

6 Questions 5 Answers 0 Followers

Questions related from Rosa Eugenia Jiménez

Is Daniel's sample size formula for estimating proportions useful for any kind of survey?

In some papers I've seen the sample size formula for estimating proportions used as a magic one for obtaining "representative samples". In these cases they use the formula as if the estimated...

09 October 2022 3,331 4 View

How to select variables for multivariate logistic regression after univariate exploration?

I´ve found different ways of dealing with the problem of selecting variables for multivariate binomial logistic regression. Some authors include only variables with a significant bivariate...

14 September 2022 7,580 3 View

Is Cronbach Alpha valid with a 3 point Likert scale?

Cronbach Alpha is very used for assessing internal consistence of a scale. It is very much used for scales with items scored with a Likert scale. I wonder if the number of the Likert scale points...

22 June 2022 8,645 6 View

Is it fair to apply exploratory and confirmatory factor analysis with the same sample?

I understand that, in general, statistical models must be developed with a sample and validated with another sample. CFA is a kind of validation way for models that have been created using EFA....

15 June 2022 4,144 1 View

Poison regression with robust variance same or better than logistic regression in a retrospective cohort study?

I wonder if it is correct to use Poisson Regression with robust variance instead of logistic regression in a retrospective cohort study. Poisson Regression with robust variance (PRRV) estimates...

25 May 2022 4,224 0 View

Cox regression or logistic regression?

Which of the two models is better to analyze factors that influence the appearance of a certain event when the data is not censored? Cox Regression or Logistic Regression? Let´s add that time to...

04 May 2022 2,982 3 View