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| F19,16,0.025 = 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, 0.238] O c. [ 2.160 , 0.309] O d. [2.063 , 0.318]

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| F19,16,0.025 = 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, 0.238] O c. [ 2.160 , 0.309] O d. [2.063 , 0.318]

College Algebra

7th Edition

ISBN:9781305115545

Author:James Stewart, Lothar Redlin, Saleem Watson

Publisher:James Stewart, Lothar Redlin, Saleem Watson

Chapter9: Counting And Probability

Section9.3: Binomial Probability

Problem 2E: If a binomial experiment has probability p success, then the probability of failure is...

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