HP17bII+ Programming t-distribution

[Don Shepherd]

(07-25-2015 05:54 PM)Thomas Klemm Wrote:  

(07-25-2015 05:21 PM)Don Shepherd Wrote:  So it should solve for t in my example, but it gives that error message.

Oops, I didn't notice that you are using the variable t.
What you are trying to calculate is the value of a function f(v, t)=(…).
But this function has no roots t where f(v, t)=0 as it's strictly positive.
Thus you'd have to use a different variable e.g. F=(…).

Cheers
Thomas

Yeah, I see what you mean. I just didn't know enough about this student t distribution thing. I saw the formula in Wikipedia and it seemed like the only variables were v (degrees of freedom) and t, and I read somewhere that you specify the degrees of freedom, therefore I thought you need to solve for t, but now I see that you specify a value for t also (so there are really two inputs) and then the value you are looking for is the whole expression with t and v plugged in. So X = (the whole expression) and solve for x.

But I've already removed my equation from my 17b after I saw your work and Dieter's work.