Bonnie Macfarlane

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Questions related from Bonnie Macfarlane

Sampling points required to confirm a species is absent?

I am looking for some advice (possible articles) on the number of sampling points one would need to establish a level of significance to confirm a species is absent?

17 October 2017 6,954 3 View

Should there be any concerns regarding sample size and number of variables when running a multivariable regression, using backward elimination?

Original idea was to run a backward approach (regression) with 80 cases/26 variables (those significant in univariate analysis plus some theory driven variables). However due to the number of...

20 July 2014 9,385 9 View

Model selection with AIC/BIC: Does it come down to choosing the model with the lowest AIC/BIC?

Should other factors also drive final model selection? I have used a linear mixed effects model to identify factors associated with depression scores over time (measured at 3 time points). I have...

12 June 2014 3,379 7 View

Pre-post design where the pre-group is a different group of participants than the post-group - any thoughts?

Study involved collecting in-hospital data for a sample ICU pts (primary outcome was total hours of mechanical ventilation) prior to the implementation of new sedation protocol. After...

13 November 2013 6,171 7 View