Either a cumulative chi-squared distribution calculator, or a set of
Originally Posted by bruxism
tables of critical values for the chi-squared distribution.
Below is the help text and example calculation from the system that
I use most frequently, when I'm not using the book of tables next to
chidis is a builtin function.
normaldis(x) : returns the probability that a normally
distributed (mean 0, st.dev. 1) is less than x.
invnormaldis(p) : is the inverse.
chidis(x,n) : chi-distribution with n degrees of freedom.
tdis(x,n) : Student's t-distribution with n degrees of freedom.
invtdis(p,n) : the inverse.
fdis(x,n,m) : f-distribution with n and m degrees of freedom.