A group of economists wants to study the average annual leave among the US and EU workers. Two samples of US and EU workers were obtained independently and analyzed. The sample of 11 US workers had the average annual leave of 16.92 days and the standard deviation 4.507 days. The sample of 15 EU workers had the average annual leave of 27.88 days and the standard deviation 3.472 days. The standard deviation for the first sample appears to be different from the standard deviation of the second sample. Verify the assumptions in Two Variances F Hypothesis Test to decide whether there is sufficient evidence that the standard deviation of the annual leave of US workers is different from the standard deviation of the annual leave of EU workers. If normality plots are not provided assume that the samples are from normal populations.

Procedure: Two Variances F Hypothesis Test

Assumptions: (select everything that applies)