HP 30b: Bug in Student function?

[Gerald H]

(01-04-2015 04:25 PM)John Smitherman Wrote:  Hi Gerald. For the problem you've stated I used the following key sequence:

5 Input 1.677
Math (shift /)
Probability (down arrow, down arrow, Input)
Student (down arrow, down arrow)

The result is Student 0.923

I hope that helps.

Regards,

John

This indeed gives the correct answer.

Should you then SWAP the two values in the stack & then SWAP them a second time & repeat the calculation the answer is wrong.

Also, if values are recalled & the calculation carried out in a programme the answer is again wrong.