Stephen Reynolds

4 Questions 116 Answers 0 Followers

Questions related from Stephen Reynolds

Chi Squared Test for comparing two tests?

Hi all, So I have several triage pathways using different tests. The sample cohort is the same however and all data is categorical (positive or negative). Is using the Chi Squared in this...

30 April 2019 1,242 4 View

How do I normalise data with a lot of '0' values?

I have a lot of data with 0 as a value, its non normal and skewed heavily to the the right which is fine and expected with the 'positive' values, however if i normalise using log etc it removed...

10 December 2018 5,762 4 View

Log^10 Skewed Data for ROC analysis and getting Cut Off Points??

So I have a lot of known disease and normal data values from a test I am devising. I have run ROC on the unaltered data and gotten values etc but the data is heavily skewed. Normals sit close to 0...

14 June 2018 2,375 1 View

The Challenge: Interpretation of Indeterminate Covid 19 results with a follow up negative

A key issue we face in reporting Covid 19 results is determining the Indeterminate or Presumptive positive result. This can take two forms, firstly a rising ct value that doesn't reach the...

01 January 1970 2,027 9 View