HP 30b: Bug in Student function?

[Dieter]

(02-15-2016 12:19 AM)lrdheat Wrote:  I checked this on the Prime...the HP 30b, when the = or other keystroke is entered is allowing (as with the Prime), decimal degrees of freedom, and is calculating cum from 0 to 1.677 for 1.677 degrees of freedom (to arrive at .8706... ). Why it does so is odd?

What exactly is odd here? Non-integer degrees of freedom can be handled easily as the Student CDF can be expressed by the Incomplete Beta function. The 34s also returns 0,8706432972715508 here.

Dieter