# Talk:Documentation/How Tos/Calc: TDIST function

From Apache OpenOffice Wiki

### ERRORS on the page

Page claims:

TDIST returns the probability density function for the t-distribution

**FALSE!** TDIST happens to actually return the CDF (actually 1-cdf(X)), not the PDF. Just plot it for 0≤X≤4, and compare to e.g. Wikipedia. Plot the differential THEN you get the pdf. The Microsoft page does a better job of explaining this by stating that TDIST(X,...) returns the probability of x>X (i.e. 1-cdf(X))