The aim of a study is to test the ratio of variances in the weight of two groups of rats being under a certain drugs A( group 1) and B( group 2). A random sample of 16 rats was selected from group...

The aim of a study is to test the ratio of variances in the weight of two groups of rats being under a certain drugs A( group 1) and B( group 2). A random sample of 16 rats was selected from group 1and 13 rats from group 2 Then their weight were recorded. The results are shown in the following table Construct a 95% confidence interval for the ratio of the varliances. [ Hint: because of the rounding select the closest interval ]

Extracted text: n Mean Median sd group 1 16 3.5 3.0 1.05 group 2 13 2.20 2.0 1.15