![The aim of a study is to test the ratio of<br>variances in the weight of two groups of rats<br>being under a certain drugs A ( group 1) and B<br>( group 2) . A random sample of 16 rats was<br>selected from group land 13 rats from group 2,<br>Then their weight were recorded. The results<br>are shown in the following table<br>n Mean Median sd<br>group 1 16 3.5<br>3.0<br>1.05<br>group 2 13 2.20 2.0<br>1.15<br>F15,12,0.05 = 0.404 F 19,16,0.025 = 0.386<br>F16,10,0.025 =0.335|<br>F16,10,0.05 =0.401 F15,12,0.1 =0.496 F19,16,0.05 =0.451<br>F10,16,0.025 = 0.286 F 12,15,0.05 =0.382 F16,19,0.025 = 0.371|<br>F10,16,0.05 = 0.354 F12,15,0.1 =0.475 F16,19,0.05 = 0.437|<br>Construct a 95% confidence interval for the<br>ratio of the variances. [ Hint: because of the<br>rounding select the closest interval ]<br>O a. None of these<br>O b. [ 2.488, O0.238 ]<br>O c. [ 2.160 , 0.309]<br>O d. [2.063 , 0.318]<br>](https://s3.us-east-1.amazonaws.com/storage.unifolks.com/qimg-008/008_pdj6x50-ipbypmzc.jpeg)
Extracted text: 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 land 13 rats from group 2, Then their weight were recorded. The results are shown in the following table n Mean Median sd group 1 16 3.5 3.0 1.05 group 2 13 2.20 2.0 1.15 F15,12,0.05 = 0.404 F 19,16,0.025 = 0.386 F16,10,0.025 =0.335| F16,10,0.05 =0.401 F15,12,0.1 =0.496 F19,16,0.05 =0.451 F10,16,0.025 = 0.286 F 12,15,0.05 =0.382 F16,19,0.025 = 0.371| F10,16,0.05 = 0.354 F12,15,0.1 =0.475 F16,19,0.05 = 0.437| Construct a 95% confidence interval for the ratio of the variances. [ Hint: because of the rounding select the closest interval ] O a. None of these O b. [ 2.488, O0.238 ] O c. [ 2.160 , 0.309] O d. [2.063 , 0.318]