percentage comparison

  1. S

    Statistically compare an observed percentage to an expected (agreed) percentage

    I performed a biomedical study where 18/3068 tested patients had a positive test result; 0.6% positive. The internationally agreed cost-effectivity threshold for this test is a positivity percentage of 0.1%. How do I formally test if the observed 0.6% is higher than the expected 0.1% from...
  2. R

    I have a large distribution of paired percentages. Is there a best way, or any way, to test for sig. different pairs?

    These percentages are based on RNA sequencing count data for which replicate values have been merged and transformed to these percentages (which represent average lengths, not counts). But since the replicate data has been lost in the transformation to %, I'm not sure if I can still test for...
  3. P

    How to analyze extremly left-skewed data?

    Hey everyone, I am facing some trouble with the data of my master thesis and so I am looking for more general advice on how to deal with this topic: I am investigating between the % of family ownership in family firms and the acquisition stake (also in %). Therefore, I planned to use a Tobit...
  4. B

    Multiple Comparison of Percentages from Binary Within-Subjects Reponse Trials

    I have searched and read a lot about this but I'm still unsure which test is suitable for the following situation. Data come from a few hundred participants who saw, in each of several trials, a pair of stimuli and made a binary judgment (indicating which stimulus in the pair has a certain...
  5. C

    Bar plot for percentages of survey response data

    Hello, I am new to using SPSS and having some trouble figuring out a way to plot some bar graphs of some survey data that I have. The data are from a multiple choice survey where participants could select one or more items. Each of their responses are stored in separate variables. If they...
  6. R

    Percentage Prevalence comparison (non-independent groups)

    Hi all! I have a dataset which I think could potentially be very exciting but I am struggling to find how to analyse it! We have gathered lots of information on the percentage if individuals who exhibit different forms of the same class of behaviour (categorical data- present/absent). All...
  7. S

    Comparing percentages

    I am doing a study, and have gathered the following data: A patient population was divided into 3 categories: Young patients (n=19) / Middle aged patients (n=66) / Old patients (n =20) Based on a questionairre, we have categorized each patient into 2 categories: "Yes family history of...
  8. A

    Comparing percentages

    I'm having trouble wrapping my head around some of this. I need to determine whether or not there is a statistical difference between two percentages. The data are as follows: In population A there are 525 teeth and out of these, 114 have cavities, thus 21.71%. In population B there are 413...