I need to figure out the Probability that $Y > 23$ for a chi-square distribution with degrees of freedom $= 7$.
The book says to do this with some applet. I don't know what it's talking about.
Can I do this on my Ti-89 (preferable) or on some website somewhere?
EDIT/UPDATE:
I found a program on my ti-89 for chi-square distribution. However it asks me for lower and upper bound and degrees of freedom. I put in $7$ for degrees of freedom but i'm not sure how to translate probability $Y > 23$ into an upper and lower bound?
I put in lower $= 0$, upper $= 23$, degrees of freedom $= 7$ and I said to auto-scale and I got $.998295$. Is that the right probability?