Critical values of an F-test with R?

The 95% confidence interval is on the ratio of the variances, not on the F statistic. Here's the F statistic calculation.

The 95% confidence interval is on the ratio of the variances, not on the F statistic. Here's the F statistic calculation: > qf(c(0.025,0.975),11,8) 1 0.2729392 4. 2434128 which agrees with your table.

If we look inside stats:::var.test. Default we find BETA 0.6908397/c(0.273,4.30) 1 2.5305484 0.1606604.

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