Description Usage Arguments Details Examples
Calculates the non-centrality parameter for a chi-square distribution for a given quantile. This is often needed for sample size calculation for chi-square based tests.
1 |
x |
a numeric value at which the distribution was evaluated |
p |
a numeric value giving the cumulative probability at |
df |
an integer giving the degrees of freedom of the chi-square variable |
The function is modeled after the SAS function CNONCT. If p
is larger
than the cumulative probability of the central chi-square distribution at x
, then
there is no solution and NA is returned.
1 2 3 |
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