Description Usage Arguments Value References

This function returns an approximation of *P(X \in E1)/P(X \in E2)*, where
*X* is a central F random variable with `df1, df2`

degrees of freedom.

1 | ```
TFRatioApprox(df1, df2, E1, E2)
``` |

`df1, df2` |
degrees of freedom of the F random variable. |

`E1, E2` |
"Intervals" objects or matrices where rows represents
a union of intervals with |

This function returns the value of the approximation.

Bryc, Wlodzimierz. "A uniform approximation to the right normal tail integral." Applied mathematics and computation 127.2 (2002): 365-374.

Peizer, David B., and John W. Pratt. "A normal approximation for binomial, F, beta, and other common, related tail probabilities, I." Journal of the American Statistical Association 63.324 (1968): 1416-1456.

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