# point-biserial

1. ### Nonparametric alternative to point-biserial correlation coefficient? - Which? t-test or Mann Whitney?

A. I know from the net that for a design with one binary variable and a second variable that is continuous but is NOT normally distributed, I can use BOTH the point-biserial correlation (which is basically the parametric Pearson correlation formula) as well as the Rank Biserial Correlation...
2. ### Association/ correlation binary and continuous data non-normal distribution

Hi, I want to perform an association analysis between a binary (dichotomous?) variable and continuous variable. The binary variable is whether something is present or not, "Yes" or "No"/ "1" or "0" .... etc. The continuous variable are numbers between ~150 and 170~. The continuous variable is...
3. ### Point-biserial correlation when some of the test assumptions is violated

Hi! I originally posted my question on StacExchange-CrossValidated, but no one there seems to be able to answer my question. This is the situation: I've got 15 raters who assess if there is deep invasion of a cancer type or not (dichotomous), and they can be either accurate or inaccurate...
4. ### ?Pearson ?point-biserial correlatiom coefficient for relationship between variables

Hi, I'm new on this forum, thanks for reading my post! I'm trying to figure out if I've used the best method for determining a relationship between variables (calculations done using Excel). I have a cohort of 38 trauma patients of different ages. I have measured their aortic diameter on...
5. ### Significance testing for biserial correlation

Hi, I have run an analysis outlined below. It would be great if the group could tell me a) if this approach is appropriate and b) if the result is significant (to 95% or 99% level). Approach I have 20,000 survey responses to the question 'how likely are you to recommend my event to a...
6. ### Rank-biserial and point biserial correlation coefficients in SPSS +

Hi there, I have tow questions regarding these analyses that I am yet to find an answer for. 1) Rank-biserial Is it possible to run this in SPSS? I have not found this option within the program and cannot find relevant advice on any forums. I am looking for relationships between sets of...